chore: add ruff and ty, fix linting

- Add ruff (line-length 88) and ty to dev dependencies
- Fix all ruff linting errors
- Configure ty to ignore nullable type warnings
- Update AGENTS.md with linting instructions

main.py

@@ -78,8 +78,12 @@ def main() -> None:
     # Message handlers
     app.add_handler(MessageHandler(filters.VOICE, handle_voice_message))
     app.add_handler(MessageHandler(filters.Document.ALL, handle_admin_document))
-    app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, handle_replica_number_input))
-    app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, handle_unexpected_text))
+    app.add_handler(
+        MessageHandler(filters.TEXT & ~filters.COMMAND, handle_replica_number_input)
+    )
+    app.add_handler(
+        MessageHandler(filters.TEXT & ~filters.COMMAND, handle_unexpected_text)
+    )
 
     logger.info("Бот запущен")
     app.run_polling()