updates the deployment pipeline and supporting configuration for AWS deployments, add pull request checks

.env.example

@@ -1,7 +1,7 @@
 # ── Gemini
 GEMINI_API_KEY=gemini-api-key
-GEMINI_FLASH_MODEL=gemini-flash-latest
-GEMINI_PRO_MODEL=gemini-2.5-pro
+GEMINI_FLASH_MODEL=gemini-3.1-flash-lite
+GEMINI_PRO_MODEL=gemini-flash-latest
 
 # ── Pinecone
 PINECONE_API_KEY=pinecone-api-key

.github/workflows/deploy.yml

@@ -1,15 +0,0 @@
-name: Deploy
-
-on:
-  workflow_dispatch:
-
-jobs:
-  placeholder:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Placeholder
-        run: echo "Workflow manually triggered"

.github/workflows/pr-check.yml

@@ -0,0 +1,20 @@
+name: Pull Request Checks
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    name: Test and Build
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build Docker image
+        run: |
+          docker build -t aegis-test .

requirements.txt

@@ -10,12 +10,12 @@ langchain-core==0.2.22
 langsmith==0.1.77
 
 # LLM — Gemini
-google.genai
+google-genai==2.8.0
 
 # Retrieval — LlamaIndex + Pinecone (aligned on llama-index-core 0.13.x)
 llama-index-core==0.13.6
 llama-index-vector-stores-pinecone==0.8.0
-llama-index-embeddings-google-genai
+llama-index-embeddings-google-genai==0.5.1
 pinecone==7.3.0
 
 # AWS