## Release Notes

### feat: upgrade MTProto layer to 229 and bump version to v0.3.243

- Upgraded Telegram MTProto layer to 229 with full TL constructors and methods
- Expanded RPC errors catalog across all 8 status categories to 940+ exceptions
- Added bot guest message support: on_guest_message decorator, GuestMessageHandler, answer_guest_query, SentGuestMessage
- Added managed bot access controls: get_managed_bot_access_settings, set_managed_bot_access_settings, BotAccessSettings
- Added dynamic poll methods: add_poll_option, delete_poll_option, PollOptionAdded, PollOptionDeleted, and extended Poll attributes
- Added Telegram Business star methods: get_business_account_star_balance, transfer_business_account_stars, delete_business_messages
- Added reaction deletion methods: delete_message_reaction, delete_all_message_reactions, and get_personal_channels
- Added tests in tests/test_layer_229.py (57/57 tests passing)
- Updated README with comprehensive guides and bumped version to v0.3.243 for automated release workflow
