feat: add database session dependency for FastAPI routes

- Introduced a new dependency in `middleware/dependencies.py` to provide an asynchronous database session using SQLModel.
- This dependency can be utilized in route functions to facilitate database operations.

tests/test_db_user.py

@@ -6,51 +6,52 @@ async def test_user_curd():
     from models import database, migration
     from models.group import Group
     from models.user import User
-    
-    await database.init_db(url='sqlite:///:memory:')
-    
+
+    await database.init_db(url='sqlite+aiosqlite:///:memory:')
+
     await migration.migration()
-    
-    # 新建一个测试用户组
-    test_user_group = Group(name='test_user_group')
-    created_group = await Group.create(test_user_group)
-    
-    test_user = User(
-        email='test_user',
-        password='test_password',
-        group_id=created_group.id
-    )
-    
-    # 测试增 Create
-    created_user = await User.create(test_user)
-    
-    # 验证用户是否存在
-    assert created_user.id is not None
-    assert created_user.email == 'test_user'
-    assert created_user.password == 'test_password'
-    assert created_user.group_id == created_group.id
-    
-    # 测试查 Read
-    fetched_user = await User.get(id=created_user.id)
-    
-    assert fetched_user is not None
-    assert fetched_user.email == 'test_user'
-    assert fetched_user.password == 'test_password'
-    assert fetched_user.group_id == created_group.id
-    
-    # 测试改 Update
-    updated_user = await User.update(
-        id=fetched_user.id,
-        email='updated_user',
-        password='updated_password'
-    )
-    
-    assert updated_user is not None
-    assert updated_user.email == 'updated_user'
-    assert updated_user.password == 'updated_password'
-    
-    # 测试删除 Delete
-    await User.delete(id=updated_user.id)
-    deleted_user = await User.get(id=updated_user.id)
-    
-    assert deleted_user is None
+
+    async for session in database.get_session():
+        # 新建一个测试用户组
+        test_user_group = Group(name='test_user_group')
+        created_group = await test_user_group.save(session)
+
+        test_user = User(
+            username='test_user',
+            password='test_password',
+            group_id=created_group.id
+        )
+
+        # 测试增 Create
+        created_user = await test_user.save(session)
+
+        # 验证用户是否存在
+        assert created_user.id is not None
+        assert created_user.username == 'test_user'
+        assert created_user.password == 'test_password'
+        assert created_user.group_id == created_group.id
+
+        # 测试查 Read
+        fetched_user = await User.get(session, User.id == created_user.id)
+
+        assert fetched_user is not None
+        assert fetched_user.username == 'test_user'
+        assert fetched_user.password == 'test_password'
+        assert fetched_user.group_id == created_group.id
+
+        # 测试改 Update
+        updated_user = await fetched_user.update(
+            session,
+            {"username": "updated_user", "password": "updated_password"}
+        )
+
+        assert updated_user is not None
+        assert updated_user.username == 'updated_user'
+        assert updated_user.password == 'updated_password'
+
+        # 测试删除 Delete
+        await updated_user.delete(session)
+        deleted_user = await User.get(session, User.id == updated_user.id)
+
+        assert deleted_user is None
+        break