added enums for status constants/fixed status not updating

src/monitor_utils/constants.py

@@ -6,6 +6,7 @@ and the expected error tuple used for known-failure handling.
 """
 
 import asyncio
+from enum import Enum
 from json import JSONDecodeError
 
 import aiohttp
@@ -58,10 +59,6 @@ BUCKET_WEBHOOK_MAP = {
     90: "90-100",
     "price_drop": "40-49",
 }
-STATUS_PENDING = "pending"
-STATUS_SENT = "sent"
-STATUS_SKIPPED = "skipped"
-STATUS_FAILED = "failed"
 
 EXPECTED_TASK_ERRORS = (
     RequestsError,
@@ -72,3 +69,12 @@ EXPECTED_TASK_ERRORS = (
     PyMongoError,
     JSONDecodeError,
 )
+
+
+class ProductStatus(str, Enum):
+    """Lifecycle status for a monitored product document."""
+
+    PENDING = "pending"
+    SENT = "sent"
+    SKIPPED = "skipped"
+    FAILED = "failed"

src/monitor_utils/database.py

@@ -14,7 +14,7 @@ from motor.motor_asyncio import AsyncIOMotorClient, AsyncIOMotorCollection
 from pymongo import UpdateOne
 from pymongo.errors import PyMongoError
 
-from monitor_utils.constants import MONGO_DATABASE_NAME, MONGO_URL, STATUS_PENDING
+from monitor_utils.constants import ProductStatus, MONGO_DATABASE_NAME, MONGO_URL
 from monitor_utils.models import Product
 
 LOGGER = logging.getLogger(__name__)
@@ -106,10 +106,10 @@ async def add_products_to_database(
 
         set_on_insert = {"discoveredDate": now}
         if price_dropped:
-            document["status"] = STATUS_PENDING
+            document["status"] = ProductStatus.PENDING
             document["priceBeforeDrop"] = old_price
         else:
-            set_on_insert["status"] = STATUS_PENDING
+            set_on_insert["status"] = ProductStatus.PENDING
 
         update = {"$set": document, "$setOnInsert": set_on_insert}
         if new_price is not None and new_price != old_price:
@@ -143,7 +143,7 @@ def build_doc_id(
     return f"{product_id}_{category_identifier}" if use_composite else product_id
 
 
-def convert_product_to_mongo(product: Product, category_identifier: str) -> dict:
+def convert_product_to_mongo(product: Product) -> dict:
     """Flatten a Product into its MongoDB document representation.
 
     Coerces string prices to floats and stamps lastUpdated with the current
@@ -151,7 +151,6 @@ def convert_product_to_mongo(product: Product, category_identifier: str) -> dict
 
     Args:
         product: Product to convert.
-        category_identifier: Category suffix retained for signature parity.
 
     Returns:
         The MongoDB document dict for the product.