Restrict search extent on high latencies. (dart-lang#9333)

Author: isoos

CHANGELOG.md

@@ -7,6 +7,7 @@ AppEngine version, listed here to ease deployment and troubleshooting.
  * Upgraded stable Dart analysis SDK to `3.11.4`
  * Upgraded stable Flutter analysis SDK to `3.41.6`.
  * Note: Started writing search snapshots in `.tar.gz` files.
+ * Note: `search_index` started to apply `description` and `name` restrictions under high load.
 
 ## `20260327t133800-all`
  * Image proxy is now disabled for all users.

app/lib/service/entrypoint/search_index.dart

@@ -203,13 +203,11 @@ class LatencyAwareSearchIndex implements SearchIndex {
     }
     if (latency < const Duration(seconds: 4)) {
       _logger.info('[text-match-description]');
-      // TODO: use `TextMatchExtent.description` after we are confident about this change.
-      return TextMatchExtent.readme;
+      return TextMatchExtent.description;
     }
     if (latency < const Duration(seconds: 10)) {
       _logger.info('[text-match-name]');
-      // TODO: use `TextMatchExtent.name` after we are confident about this change.
-      return TextMatchExtent.readme;
+      return TextMatchExtent.name;
     }
     // TODO: use `TextMatchExtent.none` after we are confident about this change.
     _logger.info('[text-match-none]');