GET /walkers — listing with pagination

The capstone: one real REST resource

You have all the pieces now — a module, a controller, an injectable service, DTOs behind a ValidationPipe, and a Prisma-backed database. This module bolts them into the thing every backend interview circles back to: a working CRUD resource. By the end you'll have a WalkersModule that answers GET /walkers (paginated), GET /walkers/:id (with a real 404), and POST /walkers (validated, 201) — the exact shape the PawWalk app talks to.

The senior framing: A REST resource isn't three clever endpoints — it's three boring ones that agree on a response shape, honest status codes, and a clean boundary between what the database stores and what the API returns.