feat: добавлена система миграций БД и CI/CD пайплайны

- Создана система отслеживания миграций (MigrationRepository, таблица migrations)
- Добавлен скрипт apply_migrations.py для автоматического применения миграций
- Созданы CI/CD пайплайны (.github/workflows/ci.yml, deploy.yml)
- Обновлена документация по миграциям в database-patterns.md
- Миграции применяются автоматически при деплое в продакшн

helper_bot/handlers/private/private_handlers.py

@@ -5,37 +5,28 @@ import asyncio
 from datetime import datetime
 
 # Third-party imports
-from aiogram import types, Router, F
+from aiogram import F, Router, types
 from aiogram.filters import Command, StateFilter
 from aiogram.fsm.context import FSMContext
-
 # Local imports - filters and middlewares
 from database.async_db import AsyncBotDB
 from helper_bot.filters.main import ChatTypeFilter
+# Local imports - utilities
+from helper_bot.keyboards import (get_reply_keyboard,
+                                  get_reply_keyboard_for_post)
+from helper_bot.keyboards.keyboards import get_reply_keyboard_leave_chat
 from helper_bot.middlewares.album_middleware import AlbumMiddleware
 from helper_bot.middlewares.blacklist_middleware import BlacklistMiddleware
-
-# Local imports - utilities
-from helper_bot.keyboards import get_reply_keyboard, get_reply_keyboard_for_post
-from helper_bot.keyboards.keyboards import get_reply_keyboard_leave_chat
 from helper_bot.utils import messages
-from helper_bot.utils.helper_func import (
-    get_first_name, 
-    update_user_info, 
-    check_user_emoji
-)
-
+from helper_bot.utils.helper_func import (check_user_emoji, get_first_name,
+                                          update_user_info)
 # Local imports - metrics
-from helper_bot.utils.metrics import (
-    track_time, 
-    track_errors,
-    db_query_time
-)
+from helper_bot.utils.metrics import db_query_time, track_errors, track_time
 
 # Local imports - modular components
-from .constants import FSM_STATES, BUTTON_TEXTS, ERROR_MESSAGES
-from .services import BotSettings, UserService, PostService, StickerService
+from .constants import BUTTON_TEXTS, ERROR_MESSAGES, FSM_STATES
 from .decorators import error_handler
+from .services import BotSettings, PostService, StickerService, UserService
 
 # Expose sleep for tests (tests patch helper_bot.handlers.private.private_handlers.sleep)
 sleep = asyncio.sleep