refactor(logger): remove unnecessary request details limit logic

fix(server): resolve memory leaks causing OOM in k8s deployment

feat(usage): add import/export functionality for usage statistics and enhance deduplication logic

**feat(auth): add AuthIndex for diagnostics and ensure usage recording**

Refactor executor error handling and usage reporting

feat(usage): add support for tracking request source in usage records

feat(config, usage): add `usage-statistics-enabled` option and dynamic toggling

rebuild branch

remove all

feat(usage): add in-memory usage statistics tracking and API endpoint

chore(docs): add and refine package-level comments across modules

feat(usage): implement usage tracking infrastructure across executors