fix(ci): E2E 健康檢查添加重試機制

2026-03-29 Claude Code:
- 添加 3 次重試，間隔 2 秒
- 顯示詳細連接錯誤信息
- 應對網路抖動問題

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

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

@@ -101,22 +101,32 @@ jobs:
           echo "🔗 檢查 API 健康狀態..."
           echo "📍 Runner: $(hostname)"
           echo "🌐 Target: $API_URL"
+          echo "🕐 Time: $(date '+%H:%M:%S')"
 
-          # 2026-03-29 Claude Code: 簡化版健康檢查，避免 SIGPIPE 問題
-          HTTP_CODE=$(curl -s -w "%{http_code}" -o /tmp/health_response.txt --connect-timeout 15 "$API_URL/api/v1/health" 2>/dev/null)
-          echo "📊 HTTP Code: [$HTTP_CODE]"
+          # 2026-03-29 Claude Code: 重試機制 (最多 3 次，間隔 2 秒)
+          for i in 1 2 3; do
+            echo "📡 嘗試連接 #$i..."
+            HTTP_CODE=$(curl -s -w "%{http_code}" -o /tmp/health_response.txt --connect-timeout 10 "$API_URL/api/v1/health" 2>&1) || true
+            echo "📊 HTTP Code: [$HTTP_CODE]"
 
-          if [ "$HTTP_CODE" = "200" ]; then
-            echo "✅ API 可用: $API_URL"
-            cat /tmp/health_response.txt
-            echo ""
-            echo "working_api_url=$API_URL" >> $GITHUB_OUTPUT
-          else
-            echo "❌ API 無法連線: $API_URL (HTTP $HTTP_CODE)"
-            echo "📋 Response:"
-            cat /tmp/health_response.txt 2>/dev/null || echo "(empty)"
-            exit 1
-          fi
+            if [ "$HTTP_CODE" = "200" ]; then
+              echo "✅ API 可用: $API_URL"
+              cat /tmp/health_response.txt
+              echo ""
+              echo "working_api_url=$API_URL" >> $GITHUB_OUTPUT
+              exit 0
+            fi
+
+            if [ $i -lt 3 ]; then
+              echo "⏳ 等待 2 秒後重試..."
+              sleep 2
+            fi
+          done
+
+          echo "❌ API 無法連線: $API_URL (HTTP $HTTP_CODE)"
+          echo "📋 Response:"
+          cat /tmp/health_response.txt 2>/dev/null || echo "(empty)"
+          exit 1
 
       - name: Run E2E Verification
         id: e2e