feat(analytics): implement API monitoring with request counts, error rates, slow endpoints, and usage by user

[abore9769]

closes #418

• Track request counts per endpoint with requests/minute rate
• Capture error rates overall and broken down by HTTP status code
• Detect slow endpoints using 1000ms avg response time threshold
  with p95/p99 percentiles
• Record per-user usage including request count, error count,
  avg response time, and last seen timestamp
• Extend interceptor to capture authenticated userId and catch
  thrown exceptions for accurate error status tracking
• Add time-windowed queries via ?window=N param (default 60m)

Endpoints: GET /analytics, /analytics/endpoints,
/analytics/slow-endpoints, /analytics/errors,
/analytics/users, /analytics/users/:userId,
DELETE /analytics/reset

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[nanaf6203-bit]

@abore9769 please stick to the task assign to you and nothing else.

[nanaf6203-bit]

@abore9769 fix the CI and also resolve conflicts

[nanaf6203-bit]

@abore9769 ??

[nanaf6203-bit]

LGTM