- Updated `GetAPIKeyUsage` to group API key usage by "base_url|api_key" composite keys.
- Adjusted logic to handle `base_url` extraction from auth attributes.
- Revised unit tests to validate "base_url|api_key" grouping behavior.
- Implemented `GetAPIKeyUsage` to expose recent request data grouped by provider and API key.
- Added supporting function `mergeRecentRequestBuckets` for bucket aggregation.
- Registered new endpoint `/v0/management/api-key-usage` in the management API.
- Included extensive unit tests for provider and key-based grouping validation.
- Updated `formatRecentRequestBucketLabel` to support configurable bucket duration.
Luis Pater