fix(anki): harden AnkiConnect requests and yomitan runtime fallback

- add request timeout and HTTP status check to verify-known-word-highlights AnkiConnect client
- let yomitan-script-runtime search on its own when the resolved manifest path isn't usable
- dedupe repeated tier-query setup in known-word-cache-maturity tests via setTierQueries helper

scripts/yomitan-script-runtime.ts

@@ -152,5 +152,6 @@ export async function createYomitanRuntimeStateWithSearch(
     }
   }
 
-  return createYomitanRuntimeState(userDataPath, resolvedExtensionPath ?? undefined);
+  // No usable manifest at the resolved path, so let the loader search on its own.
+  return createYomitanRuntimeState(userDataPath);
 }