migrations: import metadata for ConfigTable

migrations/env.py

@@ -2,9 +2,12 @@
 
 from sqlalchemy import engine_from_config
 from sqlalchemy import pool
+from sqlmodel import SQLModel
 
 from alembic import context
 
+from app.internal.db import ConfigTable
+
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
@@ -18,7 +21,7 @@
 # for 'autogenerate' support
 # from myapp import mymodel
 # target_metadata = mymodel.Base.metadata
-target_metadata = None
+target_metadata = SQLModel.metadata
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired: