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_group.py

@@ -5,35 +5,35 @@ async def test_group_curd():
     """测试数据库的增删改查"""
     from models import database, migration
     from models.group import Group
-    
-    await database.init_db(url='sqlite:///:memory:')
-    
+
+    await database.init_db(url='sqlite+aiosqlite:///:memory:')
+
     await migration.migration()
-    
-    # 测试增 Create
-    test_group = Group(name='test_group')
-    created_group = await Group.create(test_group)
-    
-    assert created_group is not None
-    assert created_group.id is not None
-    assert created_group.name == 'test_group'
-    
-    # 测试查 Read
-    fetched_group = await Group.get(id=created_group.id)
-    assert fetched_group is not None
-    assert fetched_group.id == created_group.id
-    assert fetched_group.name == 'test_group'
-    
-    # 测试更新 Update
-    updated_group = await Group.set(
-        id=fetched_group.id,
-        name='updated_group')
-    
-    assert updated_group is not None
-    assert updated_group.id == fetched_group.id
-    assert updated_group.name == 'updated_group'
-    
-    # 测试删除 Delete
-    await Group.delete(id=updated_group.id)
-    deleted_group = await Group.get(id=updated_group.id)
-    assert deleted_group is None
+
+    async for session in database.get_session():
+        # 测试增 Create
+        test_group = Group(name='test_group')
+        created_group = await test_group.save(session)
+
+        assert created_group is not None
+        assert created_group.id is not None
+        assert created_group.name == 'test_group'
+
+        # 测试查 Read
+        fetched_group = await Group.get(session, Group.id == created_group.id)
+        assert fetched_group is not None
+        assert fetched_group.id == created_group.id
+        assert fetched_group.name == 'test_group'
+
+        # 测试更新 Update
+        updated_group = await fetched_group.update(session, {"name": "updated_group"})
+
+        assert updated_group is not None
+        assert updated_group.id == fetched_group.id
+        assert updated_group.name == 'updated_group'
+
+        # 测试删除 Delete
+        await updated_group.delete(session)
+        deleted_group = await Group.get(session, Group.id == updated_group.id)
+        assert deleted_group is None
+        break