初始提交: Qihu-AIFlow v2.0.1 完整项目

- 前端 React+TypeScript (源码+构建产物)
- 后端 Python FastAPI
- 数据库迁移 001-015
- Docker部署配置
- 微信ClawBot API频道绑定
- 项目文档 README.md

backend/python/app/database.py

@@ -0,0 +1,33 @@
+"""
+AIFlow 数据库连接与Session管理
+"""
+from sqlalchemy import create_engine, event
+from sqlalchemy.orm import sessionmaker, declarative_base
+from sqlalchemy.pool import QueuePool
+from .config import DATABASE_URL
+
+engine = create_engine(
+    DATABASE_URL,
+    poolclass=QueuePool,
+    pool_size=20,
+    max_overflow=40,
+    pool_pre_ping=True,
+    pool_recycle=3600,
+    echo=False,
+)
+
+# 为日志表禁止DELETE操作添加触发器检查
+# 通过数据库层确保operation_logs, audit_logs, token_usage_logs不可删除
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+
+def get_db():
+    """获取数据库会话的依赖注入"""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()