fix(e2e): 暫時使用 node 121 直連避開 VIP 不穩定

VIP (192.168.0.125) 間歇性無法連線
暫用 node 121:32334 直連，待後續修復 keepalived

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

.github/workflows/daily-e2e-health.yaml

@@ -24,7 +24,7 @@ on:
       api_url:
         description: 'API URL to test'
         required: false
-        default: 'http://192.168.0.125:32334'
+        default: 'http://192.168.0.121:32334'
       dry_run:
         description: 'Dry run mode (skip actual approval)'
         required: false
@@ -40,7 +40,8 @@ concurrency:
 
 env:
   PYTHON_VERSION: '3.11'
-  DEFAULT_API_URL: http://192.168.0.125:32334
+  # 2026-03-29 Claude Code: VIP 不穩定，暫用 node 121 直連
+  DEFAULT_API_URL: http://192.168.0.121:32334
 
 jobs:
   e2e-health-check: