refactor: replace SQLModel with QueryModel in various models and update query methods

backend/app/models/users.py

@@ -2,10 +2,12 @@ from __future__ import annotations
 
 from uuid import UUID, uuid4
 
-from sqlmodel import Field, SQLModel
+from sqlmodel import Field
+
+from app.models.base import QueryModel
 
 
-class User(SQLModel, table=True):
+class User(QueryModel, table=True):
     __tablename__ = "users"
 
     id: UUID = Field(default_factory=uuid4, primary_key=True)