Clarify batch deletion operation constraints

Document error handling for database connection failures

Note pagination implementation for API endpoints

Add performance optimization for large datasets

Document search index optimization

Clarify track aggregation pipeline stages

Document main query function parameters

Add clarification for playlist filtering logic

Document query purpose for user authentication

Document result transformation helper

Add caching strategy for popular queries

Refactor duplicate query logic

Add error handling for empty result sets

Document query builder utility function

Document connection lifecycle handling