ci: add job for project validation

Author: DaleSeo

.github/workflows/integration.yaml

@@ -7,21 +7,19 @@ jobs:
   linelint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
+      - uses: actions/checkout@v5
 
       # PR 라벨 확인
       - name: Get PR labels
         id: pr-labels
         run: |
           echo "🔍 PR 번호: ${{ github.event.pull_request.number }}"
           pr_number="${{ github.event.pull_request.number }}"
-          
+
           echo "📋 PR 라벨 조회 중..."
           labels_json=$(gh pr view $pr_number --json labels -q '.labels[].name')
           echo "확인된 라벨: $labels_json"
-          
+
           if [ -n "$labels_json" ]; then
             has_maintenance=$(echo $labels_json | grep -q 'maintenance' && echo 'true' || echo 'false')
             echo "maintenance 라벨 포함 여부: $has_maintenance"