fix: enable CI workflows on hotfix branches

- Added hotfix/** to docker-build.yml push/PR triggers
- Added hotfix/** to e2e-tests.yml workflow_run filter
- Added hotfix/** to all integration test workflows (WAF, CrowdSec, Rate Limit, Cerberus)
- Added hotfix/** to propagate-changes.yml triggers
- Now when you push to hotfix/* branches, all CI tests will run

Fixes issue where e2e and integration tests were not running on hotfix branches.

.github/workflows/rate-limit-integration.yml

@@ -6,7 +6,7 @@ on:
   workflow_run:
     workflows: ["Docker Build, Publish & Test"]
     types: [completed]
-    branches: [main, development, 'feature/**']  # Explicit branch filter prevents unexpected triggers
+    branches: [main, development, 'feature/**', 'hotfix/**']  # Explicit branch filter prevents unexpected triggers
   # Allow manual trigger for debugging
   workflow_dispatch:
     inputs: