fix(ci): 改用 cancel-in-progress: false 避免 Runner 衝突

Runner 被取消時不會清理 _diag/pages，導致下一次 run 檔案衝突
改為排隊等待而非取消

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/cd.yaml

@@ -36,7 +36,8 @@ on:
 
 concurrency:
   group: cd-${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
+  # 2026-03-26: 改為等待而非取消，避免 Runner _diag/pages 檔案衝突
+  cancel-in-progress: false
 
 env:
   REGISTRY: 192.168.0.110:5000