Add error logging for persistence failures in docked job history toggle

## Context

In PR #9265, the `onToggleDockedJobHistory` function was updated to use a try/catch block that silently swallows persistence errors. While this is safe for users (since the local UI state is already applied before the await), adding error logging would make it easier to diagnose persistence issues in production without affecting the UX.

## Proposal

Add `console.warn` or Sentry tracking in the catch block to log persistence failures for debugging purposes.

## References

- PR: https://github.com/Comfy-Org/ComfyUI_frontend/pull/9265
- Review comment: https://github.com/Comfy-Org/ComfyUI_frontend/pull/9265#discussion_r2862083603
- Requested by: @christian-byrne

## File Location

`src/components/queue/JobHistoryActionsMenu.vue`

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-9268-Add-error-logging-for-persistence-failures-in-docked-job-history-toggle-3146d73d365081cc9dbdc894dfb3b883) by [Unito](https://www.unito.io)