fix(pally): use InvId as primary bill identifier instead of custom field

api/routes/pally.py

@@ -45,7 +45,10 @@ async def pally_callback(
     bot: Bot = Depends(get_bot),
     deps: APIDependenciesDTO = Depends(get_deps),
 ):
-    oid = custom or ""
+    # FIXED: Use InvId (which contains the order_id from bill creation) instead of custom field
+    # The InvId field contains the db_bill.id that was passed as order_id during bill creation
+    bill_id_str = InvId
+    
     logger.info(
         "Pally webhook received - InvId: %s, OutSum: %s, Commission: %s, TrsId: %s, Status: %s, "
         "CurrencyIn: %s, custom: %s, SignatureValue: %s",
@@ -80,16 +83,19 @@ async def pally_callback(
 
     logger.info("Processing successfully paid bill %s", TrsId)
 
-    # Validate custom field (order ID)
-    if not oid or not oid.isdigit():
-        logger.critical("Invalid or missing custom field for TrsId %s: '%s'", TrsId, custom)
+    # Validate bill ID (from InvId field, which contains the order_id from bill creation)
+    if not bill_id_str or not bill_id_str.isdigit():
+        logger.critical(
+            "Invalid or non-numeric bill ID in InvId field for TrsId %s: '%s'", 
+            TrsId, bill_id_str
+        )
         return "OK"
 
     # Find bill in database
-    bill = await deps.bills_repository.get_bill_by_id(session, int(oid))
+    bill = await deps.bills_repository.get_bill_by_id(session, int(bill_id_str))
 
     if not bill:
-        logger.critical("Bill %s not found in database for TrsId %s", oid, TrsId)
+        logger.critical("Bill %s not found in database for TrsId %s", bill_id_str, TrsId)
         return "OK"
 
     # Check if already processed