feat: revert meta import (#114)

revert meta import

platformics/codegen/templates/database/migrations/env.py.j2

@@ -3,7 +3,7 @@ from logging.config import fileConfig
 from alembic import context
 from sqlalchemy import create_engine
 
-from platformics.database.models import meta
+from database.models import meta
 from platformics.settings import CLISettings
 
 # this is the Alembic Config object, which provides