D-3: Relax telegram poll interval constraints: - Backend: 60-3600 → 10-86400 seconds - Frontend: min/max attributes updated - Scheduler: floor changed from 60 to 10 seconds - Test T-29: adjusted boundary value (30→5) BUG-00008: Comprehensive analysis comparing our implementation with MailAggregator_Pro, covering cursor reset, tag UI, and interval limits. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>