fixup! diigo-cache: diigo counts pages from 0; migrate stored pages (schema v2)

Docs per the docs-files-api skill: a 1–2 line @file; what a declaration is or does in JSDoc on it, not in // comments or the file header.

Generated-by: Claude Opus 5.5

diigo-cache/tests/fake-webapp.js

@@ -1,11 +1,4 @@
-/**
- * @file a stand-in for webapp's `WebAppFactory` entrypoint, for tests: an
- * auxiliary worker (plain JS — the vitest pool doesn't transform aux
- * workers) serving diigo-shaped `load_user_items` pages. 250 items (3
- * pages of 100, the last short), every third private; a few webapp ids
- * are known. Counts its diigo calls so tests
- * can tell a cache hit (no call) from a miss.
- */
+/** @file a stand-in for webapp's `WebAppFactory`, serving diigo-shaped pages to tests. */
 import { RpcTarget, WorkerEntrypoint } from "cloudflare:workers";
 
 const KNOWN_WEBAPP = "fake-webapp-id";
@@ -106,6 +99,12 @@ class FakeGet extends RpcTarget {
 	}
 }
 
+/**
+ * webapp's `WebAppFactory` entrypoint, faked: an auxiliary worker (plain
+ * JS; the vitest pool doesn't transform aux workers) serving
+ * `load_user_items` pages for a few known webapp ids. Counts its diigo
+ * calls, so tests can tell a cache hit (no call) from a miss.
+ */
 export class WebAppFactory extends WorkerEntrypoint {
 	async at(id) {
 		const kind = {