feat(server): add request logging middleware with request IDs

[Dayz-tech-co]

Closes #238

Summary

This PR adds structured API request logging with per-request correlation IDs to improve backend observability and request tracing.

What Changed

• Added server/src/middleware/request-logger.middleware.ts
• Generates a UUID requestId for every incoming request
• Attaches requestId to req
• Returns X-Request-Id in every response
• Logs structured JSON on response finish with:
  • requestId
  • method
  • path
  • statusCode
  • durationMs
• Uses pino for structured logging
• Registers app.use(requestLogger) before routes in server/src/index.ts
• Extends Express request typings to include requestId
• Adds tests for request ID propagation, structured logging, and silent behavior in test mode

Why

The backend previously had no structured request logging, which made it difficult to trace errors, investigate slow requests, and correlate frontend issues with backend logs.

Testing

• npm test -- request-logger.middleware.test.ts

Notes

• npm run build currently fails because of unrelated pre-existing TypeScript errors elsewhere in the repo.

[Anuoluwapo25]

please fix conflicts