refactor: reorganize backend module boundaries

app/db/__init__.py

@@ -7,8 +7,8 @@ from sqlalchemy.engine import Engine as SQLAlchemyEngine, ExceptionContext
 from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
 from sqlalchemy.orm import Session, as_declarative, declared_attr, scoped_session, sessionmaker
 
-from app.platform.config import settings
-from app.platform.log import logger
+from app.runtime.config import settings
+from app.runtime.log import logger
 
 
 def _database_error_metadata(error: BaseException) -> Optional[dict[str, Any]]:

app/db/init.py

@@ -4,9 +4,9 @@ import traceback
 from alembic.command import upgrade
 from alembic.config import Config
 
-from app.platform.config import settings
+from app.runtime.config import settings
 from app.db import Engine, Base
-from app.platform.log import logger
+from app.runtime.log import logger
 
 
 def init_db():

app/db/user_oper.py

@@ -5,7 +5,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import Session
 
 from app import schemas
-from app.security.access import verify_token
+from app.application.security.access import verify_token
 from app.db import DbOper, get_db, get_async_db
 from app.db.models.user import User