feat: 添加租户工具配置系统

- 新增 platform_tool_configs 表和 ToolConfig Model
- 新增工具配置 CRUD API (/api/tool-configs)
- 租户详情页添加工具配置管理 Tab
- 修复查看 Token 显示问题，添加专用获取接口

backend/app/main.py

@@ -14,6 +14,7 @@ from .routers.wechat import router as wechat_router
 from .routers.alerts import router as alerts_router
 from .routers.cost import router as cost_router
 from .routers.quota import router as quota_router
+from .routers.tool_configs import router as tool_configs_router
 from .middleware import TraceMiddleware, setup_exception_handlers, RequestLoggerMiddleware
 from .middleware.trace import setup_logging
 
@@ -66,6 +67,7 @@ app.include_router(wechat_router, prefix="/api")
 app.include_router(alerts_router, prefix="/api")
 app.include_router(cost_router, prefix="/api")
 app.include_router(quota_router, prefix="/api")
+app.include_router(tool_configs_router, prefix="/api")
 
 
 @app.get("/")