ci: capture journalctl logs when API restart fails

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -90,8 +90,13 @@ jobs:
         run: |
           sudo systemctl restart zhixi-api
           sleep 3
-          sudo systemctl is-active zhixi-api
-          echo "[deploy] zhixi-api active OK"
+          if sudo systemctl is-active zhixi-api; then
+            echo "[deploy] zhixi-api active OK"
+          else
+            echo "[deploy] zhixi-api FAILED to start — checking logs:"
+            sudo journalctl -u zhixi-api --no-pager -n 100
+            exit 1
+          fi
 
       - name: Deploy RAG Worker
         run: |