fix: 工单创建和飞书同步修复 + 日志精简

1. TSPAssistant.create_work_order 补齐 tenant_id 参数
2. workorder_sync._create_workorder 修复 SQLAlchemy session 泄漏（用 flush 替代 commit+refresh+expunge）
3. _find_existing_workorder 返回 order_id 字符串而非 ORM 对象
4. 飞书同步日志精简：
   - feishu_client API 请求/响应日志降为 DEBUG
   - flexible_field_mapper 字段映射日志降为 DEBUG
   - workorder_sync 字段转换日志降为 DEBUG
   - 只保留关键的创建/同步结果为 INFO

data/system_settings.json

@@ -1,16 +1,37 @@
 {
-  "api_timeout": 30,
-  "max_history": 10,
-  "refresh_interval": 10,
-  "auto_monitoring": true,
   "agent_mode": true,
-  "api_provider": "openai",
   "api_base_url": "",
   "api_key": "",
+  "api_provider": "openai",
+  "api_timeout": 30,
+  "auto_monitoring": true,
+  "cpu_usage_percent": 0,
+  "current_server_port": 5000,
+  "current_websocket_port": 8765,
+  "log_level": "INFO",
+  "max_history": 10,
+  "memory_usage_percent": 70.9,
+  "model_max_tokens": 1000,
   "model_name": "qwen-turbo",
   "model_temperature": 0.7,
-  "model_max_tokens": 1000,
+  "refresh_interval": 10,
   "server_port": 5000,
+  "uptime_seconds": 0,
   "websocket_port": 8765,
-  "log_level": "INFO"
+  "modules": {
+    "dashboard": true,
+    "chat": true,
+    "knowledge": true,
+    "workorders": true,
+    "conversation-history": true,
+    "alerts": true,
+    "feishu-sync": true,
+    "agent": false,
+    "token-monitor": true,
+    "ai-monitor": true,
+    "analytics": true,
+    "system-optimizer": true,
+    "settings": true,
+    "tenant-management": true
+  }
 }