new event source variable#369

masl2 merged 7 commits intomainNHSDigital/nhs-notify-supplier-api:mainfrom

fix/CCM-14248_letter-map-source-to-match-coreNHSDigital/nhs-notify-supplier-api:fix/CCM-14248_letter-map-source-to-match-coreCopy head branch name to clipboard