fix(ci): add infra/** to deploy job change rules

Deploy job now triggers on infra/k8s/** and .gitlab-ci.yml changes,
not just source code changes. Ensures K8s manifest updates get applied.

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

.gitlab-ci.yml

@@ -1383,7 +1383,7 @@ deploy:
     - job: write-manifest
       optional: true
   rules:
-    # Only deploy when source code changed (compile produced new binaries)
+    # Deploy when source code or infra manifests changed
     - if: $CI_COMMIT_BRANCH == "main" && $CI_PIPELINE_SOURCE == "push"
       changes:
         - crates/**
@@ -1391,6 +1391,8 @@ deploy:
         - services/**
         - Cargo.toml
         - Cargo.lock
+        - infra/k8s/**
+        - .gitlab-ci.yml
     - if: $CI_PIPELINE_SOURCE == "web" || $CI_PIPELINE_SOURCE == "api"
   before_script:
     # Install kubectl if not in image yet (removed once infra-runner is rebuilt)