diff --git a/.github/workflows/01-lint.yml b/.github/workflows/01-lint.yml
index 8d7234ef..70c0facb 100644
--- a/.github/workflows/01-lint.yml
+++ b/.github/workflows/01-lint.yml
@@ -166,7 +166,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🐍 Set up Python 3.12
         if: |
diff --git a/.github/workflows/02-security.yml b/.github/workflows/02-security.yml
index 6a020b37..102a56a5 100644
--- a/.github/workflows/02-security.yml
+++ b/.github/workflows/02-security.yml
@@ -28,7 +28,7 @@ jobs:
     steps:
       # 0️⃣ Checkout source code with full history for secret scanning
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0  # Need full history to scan all commits
 
@@ -46,7 +46,7 @@ jobs:
     steps:
       # 0️⃣ Checkout source code with full history
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0  # Need full history for differential scanning
 
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🔍 Scan Python dependencies (pyproject.toml, poetry.lock)
         uses: aquasecurity/trivy-action@master
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🔍 Scan Node dependencies (package.json, package-lock.json)
         uses: aquasecurity/trivy-action@master
diff --git a/.github/workflows/03-build-secure.yml b/.github/workflows/03-build-secure.yml
index 16a5d8b7..844f9c6e 100644
--- a/.github/workflows/03-build-secure.yml
+++ b/.github/workflows/03-build-secure.yml
@@ -47,7 +47,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🧹 Free Up Disk Space
         run: |
diff --git a/.github/workflows/04-pytest.yml b/.github/workflows/04-pytest.yml
index 64f96c14..9f3ae6e6 100644
--- a/.github/workflows/04-pytest.yml
+++ b/.github/workflows/04-pytest.yml
@@ -55,7 +55,7 @@ jobs:
 
       # 1️⃣ Checkout source code
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # 2️⃣ Setup Python environment
       - name: 🐍 Set up Python
diff --git a/.github/workflows/05-ci.yml b/.github/workflows/05-ci.yml
index 1ede7cc1..546757b2 100644
--- a/.github/workflows/05-ci.yml
+++ b/.github/workflows/05-ci.yml
@@ -29,7 +29,7 @@ jobs:
   test-isolation:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v4
@@ -84,7 +84,7 @@ jobs:
       EMBEDDING_MODEL: sentence-transformers/all-minilm-l6-v2
       DATA_DIR: /tmp/test-data
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/06-weekly-security-audit.yml b/.github/workflows/06-weekly-security-audit.yml
index 4fe4c81c..afb8c075 100644
--- a/.github/workflows/06-weekly-security-audit.yml
+++ b/.github/workflows/06-weekly-security-audit.yml
@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🧹 Free Up Disk Space
         run: |
@@ -122,7 +122,7 @@ jobs:
     if: always()
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 📥 Download Security Reports
         uses: actions/download-artifact@v4
diff --git a/.github/workflows/07-frontend-lint.yml b/.github/workflows/07-frontend-lint.yml
index 396ad5f0..13d81d80 100644
--- a/.github/workflows/07-frontend-lint.yml
+++ b/.github/workflows/07-frontend-lint.yml
@@ -33,7 +33,7 @@ jobs:
     steps:
       # 0️⃣ Checkout source code
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # 1️⃣ Setup Node.js environment
       - name: 📦 Setup Node.js
diff --git a/.github/workflows/ai-issue-triage.yml b/.github/workflows/ai-issue-triage.yml
index f73a861c..336ec09d 100644
--- a/.github/workflows/ai-issue-triage.yml
+++ b/.github/workflows/ai-issue-triage.yml
@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index ef260541..8a840239 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index d9b1f15f..3f30cd91 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -31,7 +31,7 @@ jobs:
       actions: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/codespace-testing.yml b/.github/workflows/codespace-testing.yml
index f4bb108d..9a0f3c07 100644
--- a/.github/workflows/codespace-testing.yml
+++ b/.github/workflows/codespace-testing.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup GitHub CLI
         run: |
diff --git a/.github/workflows/deploy_code_engine.yml b/.github/workflows/deploy_code_engine.yml
index 82b07ea0..fab32f0a 100644
--- a/.github/workflows/deploy_code_engine.yml
+++ b/.github/workflows/deploy_code_engine.yml
@@ -29,7 +29,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -60,7 +60,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
@@ -89,7 +89,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         uses: ibm-cloud/sdk-action@v1
@@ -131,7 +131,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         uses: ibm-cloud/sdk-action@v1
diff --git a/.github/workflows/deploy_complete_app.yml b/.github/workflows/deploy_complete_app.yml
index 5d6fa7d2..58972ace 100644
--- a/.github/workflows/deploy_complete_app.yml
+++ b/.github/workflows/deploy_complete_app.yml
@@ -103,7 +103,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         run: |
@@ -146,7 +146,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -178,7 +178,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -210,7 +210,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run Trivy vulnerability scanner (Backend)
         uses: aquasecurity/trivy-action@master
@@ -242,7 +242,7 @@ jobs:
       security-events: write
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run Trivy vulnerability scanner (Frontend)
         uses: aquasecurity/trivy-action@master
@@ -271,7 +271,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         run: |
@@ -327,7 +327,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         run: |
@@ -354,7 +354,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up IBM Cloud CLI
         run: |
diff --git a/.github/workflows/dev-environment-ci.yml b/.github/workflows/dev-environment-ci.yml
index eba61288..c1bf98fe 100644
--- a/.github/workflows/dev-environment-ci.yml
+++ b/.github/workflows/dev-environment-ci.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
diff --git a/.github/workflows/makefile-testing.yml b/.github/workflows/makefile-testing.yml
index 199dbdf9..c20531e2 100644
--- a/.github/workflows/makefile-testing.yml
+++ b/.github/workflows/makefile-testing.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/poetry-lock-check.yml b/.github/workflows/poetry-lock-check.yml
index bab79999..834b7319 100644
--- a/.github/workflows/poetry-lock-check.yml
+++ b/.github/workflows/poetry-lock-check.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/pr-devcontainer-info.yml b/.github/workflows/pr-devcontainer-info.yml
index f7cadb6e..7ed09b05 100644
--- a/.github/workflows/pr-devcontainer-info.yml
+++ b/.github/workflows/pr-devcontainer-info.yml
@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Check Dev Container Configuration
         id: check-devcontainer
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 2fe12eae..fad72fd7 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
diff --git a/.github/workflows/terraform-ansible-validation.yml b/.github/workflows/terraform-ansible-validation.yml
index c022c923..87a4bc62 100644
--- a/.github/workflows/terraform-ansible-validation.yml
+++ b/.github/workflows/terraform-ansible-validation.yml
@@ -52,7 +52,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🐍 Set up Python 3.12
         uses: actions/setup-python@v4
@@ -138,7 +138,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🐍 Set up Python 3.12
         uses: actions/setup-python@v4
@@ -237,7 +237,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🐍 Set up Python 3.12
         uses: actions/setup-python@v4
@@ -266,7 +266,7 @@ jobs:
 
     steps:
       - name: 📥 Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: 🔍 Terraform Security Scan
         run: |