fix: resolve GitHub Actions context access error for SLACK_WEBHOOK_URL

- Remove invalid double-quoting syntax in comprehensive-testing.yml
- Fix malformed YAML that was causing context access validation error
- Use standard GitHub Actions context expression format

Author: github-actions[bot]

.github/workflows/comprehensive-testing.yml

@@ -355,7 +355,7 @@ jobs:
         run: |
           set -e
           set -o pipefail
-          npm test -- --testPathPattern="__tests__/compatibility" --json --outputFile=compatibility-results-"${{ matrix.os }"}-"${{ matrix.node-version }"}.json
+          npm test -- --testPathPattern="__tests__/compatibility" --json --outputFile=compatibility-results-"${{ matrix.os }}"-"${{ matrix.node-version }}".json
         env:
           NODE_ENV: test
         shell: bash
@@ -468,7 +468,7 @@ jobs:
         run: |
           set -e
           set -o pipefail
-          if [ ""${{ needs.generate-reports.result }"}" = "success" ]; then
+          if [ "${{ needs.generate-reports.result }}" = "success" ]; then
             echo "status=success" >> "$GITHUB_OUTPUT"
             echo "message=All tests passed successfully! ✅" >> "$GITHUB_OUTPUT"
           else
@@ -504,5 +504,5 @@ jobs:
 
             View details: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
         env:
-          SLACK_WEBHOOK_URL: "\"${{ secrets.SLACK_WEBHOOK_URL }}\""
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
     timeout-minutes: 30

.github/workflows/contract-validation.yml

@@ -80,7 +80,7 @@ jobs:
           echo "# Contract Validation Report" > contract-validation-report.md
           echo "" >> contract-validation-report.md
           echo "**Generated:** $(date -u)" >> contract-validation-report.md
-          echo "**Commit:** "${{ github.sha }"}" >> contract-validation-report.md
+          echo "**Commit:** ${{ github.sha }}" >> contract-validation-report.md
           echo "" >> contract-validation-report.md
 
           # Run validation and capture output

.github/workflows/deploy-production.yml

@@ -208,7 +208,7 @@ jobs:
           set -e
           set -o pipefail
           set -Eeuo pipefail
-          echo ""${{ secrets.KUBE_CONFIG_STAGING }"}" | base64 -d > kubeconfig
+          echo "${{ secrets.KUBE_CONFIG_STAGING }}" | base64 -d > kubeconfig
           export KUBECONFIG=kubeconfig
           kubectl cluster-info
       - name: Deploy with Helm
@@ -224,7 +224,7 @@ jobs:
           helm upgrade --install rag-pipeline-staging ./deployment/helm/rag-pipeline \
             --namespace rag-pipeline-staging \
             --create-namespace \
-            --set image.tag="${{ github.sha }"} \
+            --set image.tag="${{ github.sha }}" \
             --set ingress.hosts[0].host=staging.rag-pipeline.yourdomain.com \
             --set-string secrets.openaiApiKey=""${OPENAI_API_KEY}"" \
             --set-string secrets.pineconeApiKey=""${PINECONE_API_KEY}"" \
@@ -271,7 +271,7 @@ jobs:
           set -e
           set -o pipefail
           set -Eeuo pipefail
-          echo ""${{ secrets.KUBE_CONFIG_PRODUCTION }"}" | base64 -d > kubeconfig
+          echo "${{ secrets.KUBE_CONFIG_PRODUCTION }}" | base64 -d > kubeconfig
           export KUBECONFIG=kubeconfig
           kubectl cluster-info
       - name: Deploy with Helm
@@ -287,7 +287,7 @@ jobs:
           helm upgrade --install rag-pipeline ./deployment/helm/rag-pipeline \
             --namespace rag-pipeline \
             --create-namespace \
-            --set image.tag="${{ github.sha }"} \
+            --set image.tag="${{ github.sha }}" \
             --set ingress.hosts[0].host=rag-pipeline.yourdomain.com \
             --set-string secrets.openaiApiKey=""${OPENAI_API_KEY}"" \
             --set-string secrets.pineconeApiKey=""${PINECONE_API_KEY}"" \