Add basic support for raw_extrinsic_metadata in the backfiller
Depends on !656 (closed)
Test Plan
needs the next diff to actually be tested
Migrated from D5226 (view on Phabricator)
Staging instance, all changes can be removed at any time
Depends on !656 (closed)
needs the next diff to actually be tested
Migrated from D5226 (view on Phabricator)