added no msrp prirority so they don't starve in queue

src/monitor_utils/database.py

@@ -20,6 +20,11 @@ from monitor_utils.models import Product
 
 LOGGER = logging.getLogger(__name__)
 
+# Drain rank for products with no MSRP. Their percentage is 0 by construction, so
+# without this they sort dead last and starve behind any backlog. 6 puts them
+# directly under the 70%+ band, tying with 60-69% and broken by createdAt.
+NO_MSRP_PRIORITY = 6
+
 
 def get_collection(collection_name: str) -> AsyncIOMotorCollection:
     """Return the named collection from the shared client's database.
@@ -282,7 +287,9 @@ def calculate_priority(document: dict) -> int:
     Always recalculated from current and original price so the priority
     reflects the prices at alert time rather than any stale stored
     percentage. Missing prices, zero original prices, and price increases
-    resolve to priority 0.
+    resolve to priority 0. A product with no MSRP has no percentage to rank
+    on and takes NO_MSRP_PRIORITY instead, since a real 0 would leave it
+    permanently behind every other alert in the claim query's sort.
 
     Args:
         document: Product document supplying the prices.
@@ -296,6 +303,9 @@ def calculate_priority(document: dict) -> int:
     if current_price is None or not original_price:
         return 0
 
+    if not document.get("hasMsrp", True):
+        return NO_MSRP_PRIORITY
+
     percentage = int(((original_price - current_price) / original_price) * 100)
     return min(max(percentage // 10, 0), 10)