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/services.py

@@ -1,46 +1,31 @@
 """Service classes for private handlers"""
 
 # Standard library imports
-import random
 import asyncio
 import html
+import random
+from dataclasses import dataclass
 from datetime import datetime
 from pathlib import Path
-from typing import Dict, Callable, Any, Protocol, Union
-from dataclasses import dataclass
+from typing import Any, Callable, Dict, Protocol, Union
 
 # Third-party imports
 from aiogram import types
 from aiogram.types import FSInputFile
 from database.models import TelegramPost, User
-from logs.custom_logger import logger
-
+from helper_bot.keyboards import get_reply_keyboard_for_post
 # Local imports - utilities
 from helper_bot.utils.helper_func import (
-    get_first_name, 
-    get_text_message, 
-    determine_anonymity,
-    send_text_message, 
-    send_photo_message,
-    send_media_group_message_to_private_chat, 
-    prepare_media_group_from_middlewares,
-    send_video_message, 
-    send_video_note_message, 
-    send_audio_message, 
-    send_voice_message,
-    add_in_db_media, 
-    check_username_and_full_name
-)
-from helper_bot.keyboards import get_reply_keyboard_for_post
-
+    add_in_db_media, check_username_and_full_name, determine_anonymity,
+    get_first_name, get_text_message, prepare_media_group_from_middlewares,
+    send_audio_message, send_media_group_message_to_private_chat,
+    send_photo_message, send_text_message, send_video_message,
+    send_video_note_message, send_voice_message)
 # Local imports - metrics
-from helper_bot.utils.metrics import (
-    track_time, 
-    track_errors, 
-    db_query_time,
-    track_media_processing,
-    track_file_operations
-)
+from helper_bot.utils.metrics import (db_query_time, track_errors,
+                                      track_file_operations,
+                                      track_media_processing, track_time)
+from logs.custom_logger import logger
 
 
 class DatabaseProtocol(Protocol):