Implement group duty pinning and user phone management

- Added functionality to pin duty messages in group chats, including scheduling updates and handling bot add/remove events.
- Introduced a new `GroupDutyPin` model to store pinned message details and a `phone` field in the `User` model for user contact information.
- Implemented commands for users to set or clear their phone numbers in private chats.
- Enhanced the repository with functions to manage group duty pins and user phone data.
- Updated handlers to register new commands and manage duty pin updates effectively.

handlers/__init__.py

@@ -2,13 +2,16 @@
 
 from telegram.ext import Application
 
-from . import commands, errors, import_duty_schedule
+from . import commands, errors, group_duty_pin, import_duty_schedule
 
 
 def register_handlers(app: Application) -> None:
     app.add_handler(commands.start_handler)
     app.add_handler(commands.help_handler)
+    app.add_handler(commands.set_phone_handler)
     app.add_handler(import_duty_schedule.import_duty_schedule_handler)
     app.add_handler(import_duty_schedule.handover_time_handler)
     app.add_handler(import_duty_schedule.duty_schedule_document_handler)
+    app.add_handler(group_duty_pin.group_duty_pin_handler)
+    app.add_handler(group_duty_pin.pin_duty_handler)
     app.add_error_handler(errors.error_handler)