refactor: 完成数据库重构 - 批量更新导入路径

- 更新35个文件的导入路径 (共65处修改)
- sqlalchemy_models  core.models (模型类)
- sqlalchemy_database_api  compatibility (兼容函数)
- database.database  core (初始化/关闭函数)
- 添加自动化导入更新工具 (scripts/update_database_imports.py)
- 所有兼容性层测试通过 (26/26)
- 数据库核心功能测试通过 (18/21)

src/chat/energy_system/energy_manager.py

@@ -203,8 +203,8 @@ class RelationshipEnergyCalculator(EnergyCalculator):
         try:
             from sqlalchemy import select
 
-            from src.common.database.sqlalchemy_database_api import get_db_session
-            from src.common.database.sqlalchemy_models import ChatStreams
+            from src.common.database.compatibility import get_db_session
+            from src.common.database.core.models import ChatStreams
 
             async with get_db_session() as session:
                 stmt = select(ChatStreams).where(ChatStreams.stream_id == stream_id)