fix: add Docker Compose V2 support for all management scripts

Add docker-compose-helper.sh to auto-detect and use:
- docker-compose (V1 - standalone)
- docker compose (V2 - plugin)

Update all 9 management scripts to use the helper:
- start.sh, stop.sh, restart.sh
- logs.sh, status.sh
- backup.sh, restore.sh, update.sh, cleanup.sh

This fixes "docker-compose: command not found" error on systems
with Docker Compose V2 installed.

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

status.sh

@@ -1,16 +1,20 @@
 #!/bin/bash
 # CodiMD 狀態檢查腳本
 
+# 載入 docker compose 輔助函數
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/docker-compose-helper.sh"
+
 echo "🔍 檢查 CodiMD 服務狀態..."
 echo ""
 
 # 顯示容器狀態
 echo "📊 Docker 容器狀態："
-docker-compose ps
+docker_compose ps
 echo ""
 
 # 檢查服務是否正常
-if docker-compose ps | grep -q "Up (healthy)"; then
+if docker_compose ps | grep -q "Up (healthy)"; then
     echo "✅ 所有服務運行正常"
 else
     echo "⚠️  部分服務可能未正常運行"
@@ -20,7 +24,7 @@ echo ""
 
 # 顯示最近日誌
 echo "📋 最近日誌（最後 20 行）："
-docker-compose logs --tail=20
+docker_compose logs --tail=20
 echo ""
 
 # 檢查磁碟空間