Remove .env_example file and implement MetricsUpdater service for enhanced metrics tracking. Update bot.py to start and stop metrics updater, and improve database connection handling in CRUD operations with metrics tracking. Update README with details on metrics issues and fixes.

services/infrastructure/database.py

@@ -22,11 +22,11 @@ class DatabaseService:
     
     def __init__(self, db_path: str):
         self.db_path = db_path
-        # Инициализируем CRUD операции
-        self.users = UserCRUD(db_path)
-        self.questions = QuestionCRUD(db_path)
-        self.user_blocks = UserBlockCRUD(db_path)
-        self.user_settings = UserSettingsCRUD(db_path)
+        # Инициализируем CRUD операции с передачей логгера
+        self.users = UserCRUD(db_path, logger)
+        self.questions = QuestionCRUD(db_path, logger)
+        self.user_blocks = UserBlockCRUD(db_path, logger)
+        self.user_settings = UserSettingsCRUD(db_path, logger)
     
     async def init(self):
         """Инициализация базы данных и создание таблиц"""
@@ -59,7 +59,7 @@ class DatabaseService:
             return
         
         # Читаем схему из файла
-        schema_path = Path(__file__).parent.parent / "database" / "schema.sql"
+        schema_path = Path(__file__).parent.parent.parent / "database" / "schema.sql"
         
         if schema_path.exists():
             logger.info("📄 Создание таблиц из схемы")