Adopt Morgan for one-line access logs and add centralized detailed error logging

[Copilot]

Current logging was custom and noisy for request tracing. This change switches request logging to a standard package with a minimal one-line format, while adding centralized rich diagnostics for error paths.

• Request logging (minimal, package-based)

  • Replaced the custom request logger with morgan.
  • Kept output intentionally compact: one line per request with method, URL, status, latency, and client IP.

• Error logging (detailed, centralized)

  • Added errorLogger Express middleware to capture propagated errors in one place.
  • Logs structured error context: timestamp, method, URL, resolved status code (err.statusCode / err.status fallback), message, and stack.

• Server wiring

  • Registered errorLogger at the end of the middleware chain in server.ts so route/middleware errors are captured consistently.

morgan.token('client-ip', (req: Request) => getClientIp(req));
export const requestLogger = morgan(':method :url :status :response-time ms - :client-ip');

export const errorLogger: ErrorRequestHandler = (err, req, _res, next) => {
  const statusCode = typeof err?.statusCode === 'number' ? err.statusCode : typeof err?.status === 'number' ? err.status : 500;
  console.error('[request-error]', {
    timestamp: new Date().toISOString(),
    method: req.method,
    url: req.originalUrl,
    statusCode,
    message: err?.message || 'Unknown error',
    stack: err?.stack
  });
  next(err);
};