fix: Deploy to K3s 添加 3 次重试，防止内网抖动导致构建失败

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -130,8 +130,10 @@ jobs:
             --from-literal=ALIYUN_SMS_ACCESS_SECRET='${{ secrets.ALIYUN_SMS_ACCESS_SECRET }}' \
             --dry-run=client -o yaml | kubectl apply -f -
 
-          # Apply manifests
+          # Apply manifests (with retry for transient network issues)
           set -o pipefail
+          for attempt in 1 2 3; do
+            echo "Deploy attempt $attempt/3..."
             {
               kubectl apply -f k8s/backend-deployment.yaml
               kubectl apply -f k8s/celery-deployment.yaml
@@ -144,7 +146,10 @@ jobs:
               kubectl rollout restart deployment/video-backend
               kubectl rollout restart deployment/celery-worker
               kubectl rollout restart deployment/video-web
-          } 2>&1 | tee /tmp/deploy.log
+            } 2>&1 | tee /tmp/deploy.log && break
+            echo "Attempt $attempt failed, retrying in 10s..."
+            sleep 10
+          done
 
       # ===== Log Center: failure reporting =====
       - name: Report failure to Log Center