AnythingLLM access control bypass: suspended users can continue using Browser Extension API keys

AnythingLLM is an application that turns pieces of content into context that any LLM can use as references during chatting. In 1.11.1 and earlier, in multi-user mode, AnythingLLM blocks suspended users on the normal JWT-backed session path, but it does not block them on the browser extension API key path. If a user already has a valid brx-... browser extension API key, that key continues to work after suspension. As a result, a suspended user can still access browser extension endpoints, read reachable workspace metadata, and continue upload or embed operations even though normal authenticated requests are rejected.