Add auto-generated Swagger/OpenAPI documentation files for the
EZ-API Control Plane. These files are generated by swaggo/swag
and provide comprehensive API documentation including:
- All admin endpoints (alerts, API keys, bindings, masters, etc.)
- Master/tenant endpoints for token management and stats
- Internal endpoints for DP-CP communication
- Authentication schemes (AdminAuth, MasterAuth)
- Request/response schema definitions
