ELI-623 changed to look for product id in header

Author: TOEL2

src/eligibility_signposting_api/config/constants.py

@@ -3,5 +3,5 @@
 URL_PREFIX = "patient-check"
 RULE_STOP_DEFAULT = False
 NHS_NUMBER_HEADER = "nhs-login-nhs-number"
-CONSUMER_ID = "nhsd-application-id"  # "Nhsd-Application-Id"
+CONSUMER_ID = "nhse-product-id"  # "NHSE-Product-ID"
 ALLOWED_CONDITIONS = Literal["COVID", "FLU", "MMR", "RSV"]