- Remove index_exists function that used op.get_bind() within transaction
- Use IF NOT EXISTS / IF EXISTS SQL syntax instead
- Fixes CREATE INDEX CONCURRENTLY error in Docker migration
- Add stream first byte timeout (TTFB) detection to trigger failover
when provider responds too slowly (configurable via STREAM_FIRST_BYTE_TIMEOUT)
- Add rate limit fail-open/fail-close strategy configuration
- Improve exception handling in stream prefetch with proper error classification
- Refactor UsageService with shared _prepare_usage_record method
- Add batch deletion for old usage records to avoid long transaction locks
- Update CLI adapters to use proper User-Agent headers for each CLI client
- Add composite indexes migration for usage table query optimization
- Fix streaming status display in frontend to show TTFB during streaming
- Remove sensitive JWT secret logging in auth service
- Add proxy field to ProviderEndpoint database model with migration
- Add ProxyConfig Pydantic model for proxy URL validation
- Extend HTTP client pool with create_client_with_proxy method
- Integrate proxy configuration in chat_handler_base.py and cli_handler_base.py
- Update admin API endpoints to support proxy configuration CRUD
- Add proxy configuration UI in frontend EndpointFormDialog
Fixes#28
- Fix table name casing (use lowercase 'models' instead of 'Model')
- Convert provider_model_aliases to jsonb for better performance and GIN index support
- Use jsonb_path_ops for more efficient JSONB GIN indexing
- Add dialect check to only apply jsonb conversion on PostgreSQL
- Improve downgrade migration to properly restore json column type
- Create indexes on provider_model_name and provider_model_aliases
- Optimize model lookup performance for direct match and alias resolution
- Support efficient JSONB queries on provider_model_aliases
