Adding sub-parts

app/models/__init__.py

@@ -7,6 +7,7 @@ from app.models.manufacturer import Manufacturer
 from app.models.part_type import PartType
 from app.models.permission import Permission
 from app.models.scope_model import ScopeModel
+from app.models.sub_part_type import SubPartType
 from app.models.refresh_token import RefreshToken
 from app.models.role import Role
 from app.models.unc_thread import UncThread
@@ -19,6 +20,7 @@ __all__ = [
     "PartType",
     "Permission",
     "ScopeModel",
+    "SubPartType",
     "RefreshToken",
     "Role",
     "UncThread",