WBS-7.9: trim CI cache-hit overhead and wait for deploy readiness

.gitea/workflows/ci.yml

@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch:
 
 # ─────────────────────────────────────────────────────────────────
 # Synology DS216j (ARMv7l 32-bit) 환경 제약
@@ -70,8 +71,13 @@ jobs:
           ls -dt "$VENV_BASE"/*/ 2>/dev/null | tail -n +3 | xargs rm -rf 2>/dev/null || true
         else
           echo "=== venv 캐시 히트: $("$VENV/bin/python" --version 2>&1) ==="
+          "$VENV/bin/python" - <<'PY'
+          import importlib
+          for mod in ("requests", "yaml", "openpyxl"):
+              importlib.import_module(mod)
+          print("venv dependency import check: PASS")
+          PY
         fi
-        "$VENV/bin/pip" install requests pyyaml openpyxl --quiet
         echo "$VENV/bin" >> $GITHUB_PATH
 
     - name: Install Node Dependencies
@@ -84,9 +90,15 @@ jobs:
 
         if [ -d "$CACHE_DIR/node_modules" ]; then
           echo "=== node_modules 캐시 히트: $LOCK_HASH ==="
-          # 캐시에서 심볼릭 링크로 연결 (복사 대신 즉시)
-          rm -rf node_modules
-          ln -s "$CACHE_DIR/node_modules" node_modules
+          # 이미 같은 캐시를 가리키고 있으면 재연결하지 않음
+          if [ -L node_modules ] && [ "$(readlink node_modules)" = "$CACHE_DIR/node_modules" ]; then
+            echo "=== node_modules already linked to cache ==="
+          else
+            if [ -e node_modules ] || [ -L node_modules ]; then
+              rm -rf node_modules
+            fi
+            ln -s "$CACHE_DIR/node_modules" node_modules
+          fi
         else
           echo "=== npm install (최초 or lock 변경) ==="
           npm install --quiet