ci: add runtime import cycle guard

.github/workflows/ci.yml

@@ -779,6 +779,11 @@ jobs:
         continue-on-error: true
         run: pnpm test:gateway:watch-regression
 
+      - name: Run import cycle guard
+        id: import_cycles
+        continue-on-error: true
+        run: pnpm check:import-cycles
+
       - name: Upload gateway watch regression artifacts
         if: always()
         uses: actions/upload-artifact@v7
@@ -811,6 +816,7 @@ jobs:
           NO_RAW_WINDOW_OPEN_OUTCOME: ${{ steps.no_raw_window_open.outcome }}
           CONTROL_UI_I18N_OUTCOME: ${{ steps.control_ui_i18n.outcome == 'skipped' && 'success' || steps.control_ui_i18n.outcome }}
           GATEWAY_WATCH_REGRESSION_OUTCOME: ${{ steps.gateway_watch_regression.outcome }}
+          IMPORT_CYCLES_OUTCOME: ${{ steps.import_cycles.outcome }}
         run: |
           failures=0
           for result in \
@@ -834,7 +840,8 @@ jobs:
             "test:extensions:package-boundary|$EXTENSION_PACKAGE_BOUNDARY_TSC_OUTCOME" \
             "lint:ui:no-raw-window-open|$NO_RAW_WINDOW_OPEN_OUTCOME" \
             "ui:i18n:check|$CONTROL_UI_I18N_OUTCOME" \
-            "gateway-watch-regression|$GATEWAY_WATCH_REGRESSION_OUTCOME"; do
+            "gateway-watch-regression|$GATEWAY_WATCH_REGRESSION_OUTCOME" \
+            "check:import-cycles|$IMPORT_CYCLES_OUTCOME"; do
             name="${result%%|*}"
             outcome="${result#*|}"
             if [ "$outcome" != "success" ]; then