docs: log latency is a few seconds

README.md

@@ -32,7 +32,7 @@ Every container's stdout is shipped to Elasticsearch by Fluent Bit; nothing to c
 
 Any field you pass to the logger becomes a queryable field:
 `req.log.info({ orderId }, "order placed")` → KQL `orderId:123`. The message string always
-overrides a `msg` key in the object, so don't name a field `msg`. Lines show up within ~10 s;
+overrides a `msg` key in the object, so don't name a field `msg`. Lines are searchable within a few seconds;
 retention is 14 days.
 
 ## Using this template