Refactor config, logging, and startup structure

Introduced pkg modules for environment config, logging, and startup initialization. Replaced direct config and logging setup in main.py with modularized functions. Updated database and migration modules to use environment variables and improved DEBUG handling. Removed tool.py and migrated password utilities to pkg. Cleaned up legacy comments and unused code in models and routes.

model/database.py

@@ -1,6 +1,8 @@
 # ~/models/database.py
 from contextlib import asynccontextmanager
 from typing import AsyncGenerator
+import os
+from dotenv import load_dotenv
 
 from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
 from sqlalchemy.orm import sessionmaker
@@ -9,11 +11,17 @@ from sqlmodel.ext.asyncio.session import AsyncSession
 
 from .migration import migration
 
-ASYNC_DATABASE_URL = "sqlite+aiosqlite:///data.db"
+# 加载环境变量
+load_dotenv('.env')
+
+# 获取 DEBUG 配置
+DEBUG = os.getenv("DEBUG", "false").lower() in ("true", "1", "yes")
+
+ASYNC_DATABASE_URL = os.getenv("DATABASE_URL", "sqlite+aiosqlite:///data.db")
 
 engine: AsyncEngine = create_async_engine(
     ASYNC_DATABASE_URL,
-    echo=True,
+    echo=DEBUG,  # 根据 DEBUG 配置决定是否输出 SQL 日志
     connect_args={
         "check_same_thread": False
     } if ASYNC_DATABASE_URL.startswith("sqlite") else {},