codeintel: coalesce null columns from partial audit logs aggregation
Created by: Strum355
For cases where only a partial set of audit logs exist for an upload (aka a full representation can't be built through the aggregation function), it is possible for columns that are expected to not contain NULL
s to contain NULL
s. This PR addresses this edge case by coalescing those columns to a default value
Test plan
Unit tests expanded to cover the edge case