refactor: 清理旧数据库文件并完成导入更新

- 将6个旧数据库文件移动到 old/ 目录归档
  * sqlalchemy_models.py
  * sqlalchemy_database_api.py
  * database.py
  * db_migration.py
  * db_batch_scheduler.py
  * sqlalchemy_init.py
- 更新剩余2个文件的导入路径
  * src/schedule/database.py
  * src/plugins/built_in/napcat_adapter_plugin/src/database.py
- 数据库重构基本完成，系统使用新的6层架构

src/common/database/old/sqlalchemy_init.py

@@ -0,0 +1,124 @@
+"""SQLAlchemy数据库初始化模块
+
+替换Peewee的数据库初始化逻辑
+提供统一的异步数据库初始化接口
+"""
+
+from sqlalchemy.exc import SQLAlchemyError
+
+from src.common.database.sqlalchemy_models import Base, get_engine, initialize_database
+from src.common.logger import get_logger
+
+logger = get_logger("sqlalchemy_init")
+
+
+async def initialize_sqlalchemy_database() -> bool:
+    """
+    初始化SQLAlchemy异步数据库
+    创建所有表结构
+
+    Returns:
+        bool: 初始化是否成功
+    """
+    try:
+        logger.info("开始初始化SQLAlchemy异步数据库...")
+
+        # 初始化数据库引擎和会话
+        engine, session_local = await initialize_database()
+
+        if engine is None:
+            logger.error("数据库引擎初始化失败")
+            return False
+
+        logger.info("SQLAlchemy异步数据库初始化成功")
+        return True
+
+    except SQLAlchemyError as e:
+        logger.error(f"SQLAlchemy数据库初始化失败: {e}")
+        return False
+    except Exception as e:
+        logger.error(f"数据库初始化过程中发生未知错误: {e}")
+        return False
+
+
+async def create_all_tables() -> bool:
+    """
+    异步创建所有数据库表
+
+    Returns:
+        bool: 创建是否成功
+    """
+    try:
+        logger.info("开始创建数据库表...")
+
+        engine = await get_engine()
+        if engine is None:
+            logger.error("无法获取数据库引擎")
+            return False
+
+        # 异步创建所有表
+        async with engine.begin() as conn:
+            await conn.run_sync(Base.metadata.create_all)
+
+        logger.info("数据库表创建成功")
+        return True
+
+    except SQLAlchemyError as e:
+        logger.error(f"创建数据库表失败: {e}")
+        return False
+    except Exception as e:
+        logger.error(f"创建数据库表过程中发生未知错误: {e}")
+        return False
+
+
+async def get_database_info() -> dict | None:
+    """
+    异步获取数据库信息
+
+    Returns:
+        dict: 数据库信息字典，包含引擎信息等
+    """
+    try:
+        engine = await get_engine()
+        if engine is None:
+            return None
+
+        info = {
+            "engine_name": engine.name,
+            "driver": engine.driver,
+            "url": str(engine.url).replace(engine.url.password or "", "***"),  # 隐藏密码
+            "pool_size": getattr(engine.pool, "size", None),
+            "max_overflow": getattr(engine.pool, "max_overflow", None),
+        }
+
+        return info
+
+    except Exception as e:
+        logger.error(f"获取数据库信息失败: {e}")
+        return None
+
+
+_database_initialized = False
+
+
+async def initialize_database_compat() -> bool:
+    """
+    兼容性异步数据库初始化函数
+    用于替换原有的Peewee初始化代码
+
+    Returns:
+        bool: 初始化是否成功
+    """
+    global _database_initialized
+
+    if _database_initialized:
+        return True
+
+    success = await initialize_sqlalchemy_database()
+    if success:
+        success = await create_all_tables()
+
+    if success:
+        _database_initialized = True
+
+    return success