feat: Use `raw_id_fields` to make search easier [Cherrypick] [BB-6015]
Description
This MR cherrypicks commit d0a4bf45 (MR#32) for deployment to v1 billing servers
Also, added a short note in README about the purpose of billing-v1 branch
Supporting information
Testing instructions
- Deploy to billing v1 stage server
- Check cherry-picked changes are reflecting
Deadline
"None" if there's no rush, or provide a specific date or event (and reason) if there is one.
Edited by Kaustav Banerjee