Split CI into two steps, build/run with uploaded artifacts

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: run-demo
+name: build-and-release-demo
 
 on:
   # schedule:
@@ -49,6 +49,9 @@ jobs:
             -package `
             -archive
 
-      - name: Run simulation
-        run: |
-          docker exec unreal C:\workspace\checkout\Builds\Windows\SentryTower.exe -Unattended -nullrhi --idle
+      - name: Upload SentryTower.exe
+        uses: actions/upload-artifact@v4
+        with:
+          name: SentryTower
+          path: checkout/Builds/Windows/SentryTower.exe
+          retention-days: 90

.github/workflows/run-demo.yml

@@ -0,0 +1,36 @@
+name: run-demo
+
+on:
+  # schedule:
+  #   - cron: '0 */2 * * *' # every two hours
+  workflow_dispatch:
+
+jobs:
+  run:
+    name: Run Demo
+    runs-on: windows-latest
+
+    steps:
+      - name: Get latest build run
+        id: get-run
+        run: |
+          $runs = Invoke-RestMethod -Uri "https://api.github.com/repos/${{ github.repository }}/actions/workflows/ci.yml/runs?status=success&per_page=1" -Headers @{Authorization="Bearer ${{ secrets.GITHUB_TOKEN }}"}
+          $runId = $runs.workflow_runs[0].id
+          echo "run-id=$runId" >> $env:GITHUB_OUTPUT
+
+      - name: Download SentryTower.exe
+        uses: actions/download-artifact@v4
+        with:
+          name: SentryTower
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          repository: ${{ github.repository }}
+          run-id: ${{ steps.get-run.outputs.run-id }}
+
+      - name: Run simulation
+        run: |
+          .\SentryTower.exe -Unattended -nullrhi --idle
+          if ($LASTEXITCODE -eq 0) {
+            Write-Error "Expected non-zero exit code but got 0"
+            exit 1
+          }
+          Write-Output "Simulation completed with expected non-zero exit code: $LASTEXITCODE"