The database schema defines owner_id as UUID, but the Calendar entity
stored it as String. This caused a type mismatch error when creating
calendars via CalDAV clients like DAVx:
column "owner_id" is of type uuid but expression is of type text
Changes:
- Change Calendar.owner_id from String to Uuid
- Update new() and with_id() to accept Uuid
- Update owner_id() getter to return &Uuid
- Update belongs_to() to accept &Uuid
- Update calendar_storage_adapter to pass Uuid directly
- Update tests to use Uuid::new_v4()
Fixes#200
BillionClaw
7645792d5a