- Introduced NanoToTime and TimeToNano functions for converting between UnixNano and time.Time, improving clarity and consistency in timestamp management.
- Updated Assistant model to utilize the new utility functions for created_at and updated_at fields.
- Refactored Xun store methods to ensure UTC compatibility for timestamp serialization across different database drivers.
- Added unit tests for the new conversion functions to validate their correctness and behavior.
- Updated database configuration to include PostgreSQL 14.0 in CI workflows.
- Enhanced JSON null detection in the Xun store to support PostgreSQL dialect.
- Refactored time conversion utilities to handle multiple database formats, including PostgreSQL.
- Improved cleanup logic in the DataCleaner to ensure proper order of operations for referential integrity.
- Added utility functions for converting between Unix timestamps and database timestamps.
