fix db qualifier name

Author: qdriven

src/qpydao/core/repository.py

@@ -15,11 +15,11 @@ def __new__(
         bases,
         attrs,
         base_type: SQLModel | BaseModel | Any = SQLModel,
-        db_qualify="default",
+        db_qualifier="default",
         **kwargs,
     ):
         x = super().__new__(cls, name, bases, attrs, **kwargs)
         x.base_type = base_type
-        x.db_qualifier = db_qualify
+        x.db_qualifier = db_qualifier
         x.db_client = databases.get_db(x.db_qualifier)
         return x