user model upgrade, rating, notificaiton

orm/rating.py

@@ -0,0 +1,10 @@
+
+from sqlalchemy import Column, Integer, String, ForeignKey
+from orm.base import Base
+
+class Rating(Base):
+	__tablename__ = 'rating'
+
+	id: int = Column(Integer, primary_key = True)
+	createdBy: int = Column(ForeignKey("user.id"), primary_key = True)
+	value: int = Column(Integer, nullable=False)