[Docs] Correct the Swagger documentation URL

## Location docs/development.md, Local development, Server and dashboard ## Problem The documentation says Swagger is served at /docs, but the NestJS server mounts it at /api/docs. ## Correction Use the verified path /api/docs and, where appropriate, the full local URL http://localhost:3000/api/docs. Check nearby API and dashboard URL references for consistency. ## Acceptance criteria - No documentation claims Swagger is available at /docs. - The documented URL matches the server configuration. - Documentation-only change.