fix(test): override the dead limitd-protocol hashlru git ref

`limitd-protocol@2.1.1` (a transitive of every `limitd-client` sandbox)
declares `hashlru: 'jfromaniello/hashlru#return_value_on_set'`. The
branch on the `jfromaniello/hashlru` fork no longer exists — only
`master` is left — and bun aborts with
`hashlru@jfromaniello/hashlru#return_value_on_set failed to resolve`.
Yarn 1.x silently fell back to the default branch, masking it.

The fork's `master` is the same 2.0.0 implementation that ships on
npm as `hashlru@2.x`, so add it to the workspace overrides.

Author: BridgeAR

scripts/install_plugin_modules.js

@@ -403,8 +403,18 @@ async function assertWorkspaces () {
       //   and `<3.25.0` satisfies that range too. Bun does not support
       //   nested override keys (oven-sh/bun#6608), so a flat key is
       //   required here even though only the ai sandbox needs it.
+      // - `limitd-protocol@2.1.1` (pulled in by every `limitd-client`
+      //   sandbox) pins `hashlru: 'jfromaniello/hashlru#return_value_on_set'`.
+      //   The branch on `jfromaniello/hashlru` does not exist any more —
+      //   only `master` is left — so bun reports
+      //   `hashlru@jfromaniello/hashlru#return_value_on_set failed to
+      //   resolve` and aborts the install. yarn 1.x silently fell back to
+      //   the default branch, masking it. The fork's `master` is the same
+      //   2.0.0 implementation that ships on npm as `hashlru@2.x`, so pin
+      //   to the published version.
       overrides: {
         collections: '^5.0.0',
+        hashlru: '^2.3.0',
         '@langchain/openai@0.0.34/@langchain/core': '^0.2.0',
         'zod-to-json-schema': '<3.25.0',
       },