feat: add PolicyPackSelectorComponent with tests and integration

- Implemented PolicyPackSelectorComponent for selecting policy packs.
- Added unit tests for component behavior, including API success and error handling.
- Introduced monaco-workers type declarations for editor workers.
- Created acceptance tests for guardrails with stubs for AT1–AT10.
- Established SCA Failure Catalogue Fixtures for regression testing.
- Developed plugin determinism harness with stubs for PL1–PL10.
- Added scripts for evidence upload and verification processes.

.gitea/workflows/promote.yml

@@ -22,13 +22,16 @@ jobs:
     runs-on: ubuntu-22.04
     environment: production
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Resolve staging credentials
-        id: staging
-        run: |
-          missing=()
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Task Pack offline bundle fixtures
+        run: python3 scripts/packs/run-fixtures-check.sh
+
+      - name: Resolve staging credentials
+        id: staging
+        run: |
+          missing=()
 
           host="${{ secrets.STAGING_DEPLOYMENT_HOST }}"
           if [ -z "$host" ]; then host="${{ vars.STAGING_DEPLOYMENT_HOST }}"; fi