September 2025 performance summary for ude-soco/CourseMapper-webserver. Focused on delivering a robust YouTube data retrieval workflow under quota constraints, resulting in higher reliability and data availability for course mapping. Key features delivered: - YouTube API key rotation and robust data retrieval: Implemented a managed list of developer keys and key-switching logic to keep data flowing during quota pressure. Updated core data-fetch paths to leverage key management for more reliable data retrieval. Major bugs fixed: - Improved resilience to API quota errors and key rotation failures by introducing centralized key management and retry-ready data fetch paths, reducing data gaps during peak usage. Overall impact and accomplishments: - Increased data retrieval reliability and stability for YouTube data used in CourseMapper, leading to fewer failed fetches and more predictable data provisioning for downstream consumers. - Performance and reliability improvements support higher throughput in data provisioning pipelines and a better user experience for course data consumers. Technologies/skills demonstrated: - Python service architecture enhancements, API integration patterns, error handling and retry logic, and refactoring for maintainability. - Experience with quota management strategies, observability considerations, and release-safe code changes. - Commit-focused delivery: aligned changes in youtube_service.py to enable robust key management (commit ef3acbbb5cc4bd127be0f483272ae54162177e4d).