Measured 14 backend connections against max_connections=100, so the api-lane hook timeouts are not connection exhaustion; the PostgreSQL Failed query lines are a torn-down reconciler polling after the fact. Full 15-lane run at 23,584 tests reproduced nothing, and the DDL admission gate never degraded, so that mechanism is unsupported too. Records what a future attempt must capture. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>