September 2025 monthly summary for profcomff/rental-api: Delivered targeted enhancements to rental session management, improving reliability, error handling, and lifecycle accuracy. Implemented a new SessionExists exception to prevent duplicate rental sessions for the same item type and corrected the session expiration flow to set status to EXPIRED instead of CANCELED. These changes reduce duplicate bookings, improve reporting accuracy, and align with business rules, while maintaining API compatibility. Commit 9eb81e04e56e0c9495a4ee5677772fb6a556ca96 (message: fix) included.

July 2025: Delivered targeted codebase cleanup for profcomff/rating-api, removing an unused Comment model method from db.py and a cosmetic blank line change. No functional changes; readability and maintainability improved. Changes were implemented through two commits and prepared for easier future enhancements.

May 2025 monthly summary for profcomff/rating-api: Delivered significant enhancements to the Comment System to improve reliability, performance, and test stability. Implemented internal refactor and migration adjustments for comment models, optimized retrieval and sorting by preferring 'mark' over 'create_ts', fixed boolean evaluation in search logic, and strengthened test reliability by adding UUIDs to comment fixtures. These changes reduce production risk, improve data quality, and streamline future migrations.