feat: add support for recent request tracking in auth records

- Implemented `RecentRequestsSnapshot` in `Auth` to capture bucketed recent request data.
- Added new fields and methods to `Auth` for tracking request success and failure counts over time.
- Updated `/v0/management/auth-files` response to include recent request data for each auth record.
- Introduced unit tests to validate request tracking and snapshot generation logic.

sdk/cliproxy/auth/conductor.go

@@ -2021,6 +2021,7 @@ func (m *Manager) MarkResult(ctx context.Context, result Result) {
 	m.mu.Lock()
 	if auth, ok := m.auths[result.AuthID]; ok && auth != nil {
 		now := time.Now()
+		auth.recordRecentRequest(now, result.Success)
 
 		if result.Success {
 			if result.Model != "" {