fix: clean up GitHub Actions workflows

- Enable GHA build cache across all workflows (replace no-cache: true)
- Add [skip ci] guard to build-and-push to prevent duplicate latest
  builds during releases
- Remove dead serverless branch trigger and build-routing-proxy job
- Remove unused id-token: write permission
- Add branch guard and contents: read permission to quick-fix workflow
- Fix release notes heredoc indentation so markdown renders correctly
- Fix git describe to use HEAD~1 for accurate changelog after version bump

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/build-and-push.yaml

@@ -4,7 +4,6 @@ on:
   push:
     branches:
       - main
-      - 'feature/serverless-*'  # Build development images for serverless features
   pull_request:
     branches:
       - main
@@ -17,10 +16,12 @@ env:
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
+    if: >-
+      github.event_name != 'push'
+      || !contains(github.event.head_commit.message, '[skip ci]')
     permissions:
       contents: read
       packages: write
-      id-token: write
 
     steps:
       - name: Checkout repository
@@ -55,50 +56,6 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          no-cache: true
-          platforms: linux/amd64
-
-  # Build routing proxy image for serverless features
-  build-routing-proxy:
-    runs-on: ubuntu-latest
-    # Only build routing proxy for serverless feature branches
-    if: github.ref == 'refs/heads/feature/serverless-2.0.0' && github.event_name != 'pull_request'
-    permissions:
-      contents: read
-      packages: write
-      id-token: write
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Log in to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata for routing proxy
-        id: meta-proxy
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/cpfarhood/devcontainer-routing-proxy
-          tags: |
-            type=raw,value=latest
-            type=raw,value=2.0.0-dev
-            type=sha,prefix=sha-
-
-      - name: Build and push routing proxy image
-        uses: docker/build-push-action@v6
-        with:
-          context: ./serverless/routing-proxy
-          push: true
-          tags: ${{ steps.meta-proxy.outputs.tags }}
-          labels: ${{ steps.meta-proxy.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
           platforms: linux/amd64

.github/workflows/quick-fix.yaml

@@ -16,7 +16,9 @@ env:
 jobs:
   build:
     runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
     permissions:
+      contents: read
       packages: write
 
     steps:

.github/workflows/release-unified.yaml

@@ -100,7 +100,8 @@ jobs:
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
-          no-cache: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
           platforms: linux/amd64
 
       - name: Publish Helm Chart to GitHub Pages
@@ -157,31 +158,35 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           # Build release notes
-          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          PREV_TAG=$(git describe --tags --abbrev=0 HEAD~1 2>/dev/null || echo "")
           if [ -z "$PREV_TAG" ]; then
             COMMITS=$(git log --pretty=format:"- %s (%h)" HEAD)
           else
             COMMITS=$(git log --pretty=format:"- %s (%h)" "${PREV_TAG}..HEAD")
           fi
 
-          cat > release-notes.md <<EOF
-          ## Release ${{ steps.version.outputs.version }}
+          cat > release-notes.md <<'NOTESEOF'
+          ## Release RELEASE_VERSION
 
           ### Changes
-          ${COMMITS}
+          RELEASE_COMMITS
 
           ### Docker Image
-          \`\`\`bash
-          docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}
-          \`\`\`
+          ```bash
+          docker pull RELEASE_IMAGE
+          ```
 
           ### Helm Chart
-          \`\`\`bash
+          ```bash
           helm repo add devcontainer https://cpfarhood.github.io/devcontainer
           helm repo update
-          helm install mydev devcontainer/devcontainer --version ${{ steps.version.outputs.version }} --set name=mydev
-          \`\`\`
-          EOF
+          helm install mydev devcontainer/devcontainer --version RELEASE_VERSION --set name=mydev
+          ```
+          NOTESEOF
+          sed -i 's/^          //' release-notes.md
+          sed -i "s|RELEASE_VERSION|${{ steps.version.outputs.version }}|g" release-notes.md
+          sed -i "s|RELEASE_IMAGE|${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.tag }}|g" release-notes.md
+          sed -i "s|RELEASE_COMMITS|${COMMITS}|g" release-notes.md
 
           gh release create "${{ steps.version.outputs.tag }}" \
             --title "Release ${{ steps.version.outputs.tag }}" \