Implement Alumni CRUD API routes

[jask1m]

Summary

Create api/routes/Alumni.js with CRUD endpoints for alumni profiles. The Express server (api/server.js) is already set up to mount this router at /api.

Endpoints to implement

Method	Path	Description
GET	/api	List all alumni profiles
GET	/api/:id	Get a single alumni profile by ID
POST	/api	Create a new alumni profile
PUT	/api/:id	Update an existing alumni profile
DELETE	/api/:id	Delete an alumni profile

Context

• The Alumni model is already defined in api/models/Alumni.js
• The router should be exported as an Express Router (module.exports = router)
• server.js will import this file with require('./routes/Alumni') and mount it at /api

Running locally

docker compose -f docker-compose.dev.yml up --build

Test with:

curl http://localhost:8081/api