Steps to replicate the issue (include links if applicable):

• listen to Realtime or look up entities that are present in On-demand, look at "date_created"

What happens?:
"date_created" is currently the same as "date_modified", also if the entity/property is created earlier.

What should have happened instead?:
Date_created should reflect the original date of the creation event, or the article’s first revision of the entity/property, matching the date_created def in our data dictionary https://enterprise.wikimedia.com/docs/data-dictionary/#date_created