[NEW] Heartbeat-based healthcheck: detects event loop hangs (not just process alive)
[NEW] Base image bumped to Ubuntu 24.04
[NEW] Professional logging system with levels, timestamps and colors (logger.py)
[NEW] Modular refactor: utils/ (file_helpers, telegram_helpers) and services/ (extraction, donors, video)
[FIX] URL_PATTERN: removed spurious backslashes that allowed literal \ in URLs
[FIX] is_admin() returned None instead of False for non-admin users
Full Changelog: v3.1.6...v3.2.0