added has_msrp for no msrp based products(new lists)

src/monitor_utils/models.py

@@ -62,6 +62,7 @@ class PricingInfo:
     price_before_drop: float | None = None
     edu_price: float | None = None
     past_prices: list[dict] | None = None
+    has_msrp: bool = True
 
 
 @dataclass