chore(ci): tighten backend workflow path filters

.github/workflows/main-ci.yml

@@ -53,21 +53,53 @@ jobs:
           filters: |
             api:
               - 'api/**'
-              - 'docker/**'
               - '.github/workflows/api-tests.yml'
+              - '.github/workflows/expose_service_ports.sh'
+              - 'docker/.env.example'
+              - 'docker/middleware.env.example'
+              - 'docker/docker-compose.middleware.yaml'
+              - 'docker/docker-compose-template.yaml'
+              - 'docker/generate_docker_compose'
+              - 'docker/ssrf_proxy/**'
+              - 'docker/volumes/sandbox/conf/**'
             web:
               - 'web/**'
               - '.github/workflows/web-tests.yml'
               - '.github/actions/setup-web/**'
             vdb:
               - 'api/core/rag/datasource/**'
-              - 'docker/**'
+              - 'api/tests/integration_tests/vdb/**'
               - '.github/workflows/vdb-tests.yml'
+              - '.github/workflows/expose_service_ports.sh'
+              - 'docker/.env.example'
+              - 'docker/middleware.env.example'
+              - 'docker/docker-compose.yaml'
+              - 'docker/docker-compose-template.yaml'
+              - 'docker/generate_docker_compose'
+              - 'docker/certbot/**'
+              - 'docker/couchbase-server/**'
+              - 'docker/elasticsearch/**'
+              - 'docker/iris/**'
+              - 'docker/nginx/**'
+              - 'docker/pgvector/**'
+              - 'docker/ssrf_proxy/**'
+              - 'docker/startupscripts/**'
+              - 'docker/tidb/**'
+              - 'docker/volumes/**'
               - 'api/uv.lock'
               - 'api/pyproject.toml'
             migration:
               - 'api/migrations/**'
+              - 'api/.env.example'
               - '.github/workflows/db-migration-test.yml'
+              - '.github/workflows/expose_service_ports.sh'
+              - 'docker/.env.example'
+              - 'docker/middleware.env.example'
+              - 'docker/docker-compose.middleware.yaml'
+              - 'docker/docker-compose-template.yaml'
+              - 'docker/generate_docker_compose'
+              - 'docker/ssrf_proxy/**'
+              - 'docker/volumes/sandbox/conf/**'
 
   # Run tests in parallel while always emitting stable required checks.
   api-tests-run: