Enhance bot functionality and refactor database interactions

- Added `ca-certificates` installation to Dockerfile for improved network security.
- Updated health check command in Dockerfile to include better timeout handling.
- Refactored `run_helper.py` to implement proper signal handling and logging during shutdown.
- Transitioned database operations to an asynchronous model in `async_db.py`, improving performance and responsiveness.
- Updated database schema to support new foreign key relationships and optimized indexing for better query performance.
- Enhanced various bot handlers to utilize async database methods, improving overall efficiency and user experience.
- Removed obsolete database and fix scripts to streamline the project structure.

database/repositories/message_repository.py

@@ -0,0 +1,44 @@
+from datetime import datetime
+from typing import Optional
+from database.base import DatabaseConnection
+from database.models import UserMessage
+
+
+class MessageRepository(DatabaseConnection):
+    """Репозиторий для работы с сообщениями пользователей."""
+    
+    async def create_tables(self):
+        """Создание таблицы сообщений пользователей."""
+        query = '''
+            CREATE TABLE IF NOT EXISTS user_messages (
+                id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+                message_text TEXT,
+                user_id INTEGER,
+                telegram_message_id INTEGER NOT NULL,
+                date INTEGER NOT NULL,
+                FOREIGN KEY (user_id) REFERENCES our_users (user_id) ON DELETE CASCADE
+            )
+        '''
+        await self._execute_query(query)
+        self.logger.info("Таблица сообщений пользователей создана")
+    
+    async def add_message(self, message: UserMessage) -> None:
+        """Добавление сообщения пользователя."""
+        if message.date is None:
+            message.date = int(datetime.now().timestamp())
+        
+        query = """
+            INSERT INTO user_messages (message_text, user_id, telegram_message_id, date) 
+            VALUES (?, ?, ?, ?)
+        """
+        params = (message.message_text, message.user_id, message.telegram_message_id, message.date)
+        
+        await self._execute_query(query, params)
+        self.logger.info(f"Новое сообщение добавлено: telegram_message_id={message.telegram_message_id}")
+    
+    async def get_user_by_message_id(self, message_id: int) -> Optional[int]:
+        """Получение пользователя по message_id."""
+        query = "SELECT user_id FROM user_messages WHERE telegram_message_id = ?"
+        rows = await self._execute_query_with_result(query, (message_id,))
+        row = rows[0] if rows else None
+        return row[0] if row else None