storage: mark add'l WAL latency metric essential#155395

craig[bot] merged 1 commit intocockroachdb:mastercockroachdb/cockroach:masterfrom

rmloveland:20251014-DOC-13184-storage-wal-failover-write-and-sync-latency-metricrmloveland/cockroach:20251014-DOC-13184-storage-wal-failover-write-and-sync-latency-metricCopy head branch name to clipboard