chore(debug): add needs probe job in caller workflow

Add a non-reusable job chained by needs to isolate whether ci=0s is caused by needs handling for reusable uses jobs.

Made-with: Cursor

.gitea/workflows/ci.yml

@@ -17,6 +17,16 @@ jobs:
           echo "DBG_CALLER_RUN_DEPLOY='${{ vars.RUN_DEPLOY }}'"
       #endregion
 
+  needs_probe:
+    needs: [preflight_debug]
+    runs-on: ubuntu-latest
+    steps:
+      #region agent log
+      - name: Probe non-reusable needs chaining
+        run: |
+          echo "DBG_NEEDS_PROBE='after_preflight_ok'"
+      #endregion
+
   ci:
     needs: [preflight_debug]
     # Pin SHA (bump when wdipl-actions ci.yml changes). Propagates ci_steps via build workflow outputs.