docs(web): add header comment to new file

web/src/engine/predictive-text/worker-thread/src/main/correction/token-result-mapping.ts

@@ -1,3 +1,13 @@
+/*
+ * Keyman is copyright (C) SIL Global. MIT License.
+ *
+ * Created by jahorton on 2026-04-02
+ *
+ * This file defines the type used for tracking critical graph-search properties
+ * utilized during correction-search by the `getBestMatches` algorithm when run
+ * against individual tokens / words.
+ */
+
 import { LexicalModelTypes } from '@keymanapp/common-types';
 
 import { SearchNode, TraversableToken } from "./distance-modeler.js";