Geo: Add partial indexes for missing_on_primary = 't' for file_registry and job_artifact_registry and later lfs_object_registry
Do we need to index this column since we query it repeatedly? Probably not since it's a boolean field, but maybe a partial index for
First question: Should we do it? In that MR, I did some manual testing in GPRD and found similar queries to take less than 0.5 seconds.