Harden admin telemetry and deployment safeguards

.gitea/workflows/deploy.yml

@@ -84,6 +84,9 @@ jobs:
       - name: Validate admin render mode
         run: bash scripts/validate_admin_render.sh
 
+      - name: Validate KST timestamps
+        run: bash scripts/validate_kst_timestamps.sh
+
       - name: Generate build info
         run: |
           COMMIT_HASH=$(git rev-parse --short HEAD)
@@ -127,7 +130,7 @@ jobs:
         run: |
           set -e
           export TAXBAIK_DEPLOY_FROM_CI=1
-          TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+          TIMESTAMP=$(TZ=Asia/Seoul date +%Y%m%d_%H%M%S)
           COMMIT=$(git rev-parse --short HEAD)
           DEPLOY_HOST="${{ secrets.DEPLOY_HOST }}"
           DEPLOY_USER="${{ secrets.DEPLOY_USER }}"