RE1-T107 Added checkin timers to calls

[ucswift]

Summary by CodeRabbit

• New Features
  • Check-in timers: configurable defaults, per-call enable/disable (with department auto-enable and template support), per-call overrides, real-time color-coded statuses, in-UI check-in modal with optional geolocation, and call-level toggle.
  • Calendar attendance: self/admin check-in/out, edit/delete, printable signup sheets, and event attendance reports (summary and detail).
• API & Web
  • v4 endpoints and web UI pages for managing timers, check-ins, histories, and reports.
• Permissions & Auditing
  • New log-delete permission and audit events for log and check-in actions.