Update check for nikshay id with a fallback check for valid public registration 
Update check for nikshay id with a fallback check for valid public registration 

This is needed to not miss notifications in case the registration notification for nikshay id is still pending, instead fail at notification and hopefully succeed by third retry once nikshay id is fetched
dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq