Base demo corpus

These are the 0 demo documents (English RBAC + Arabic Egypt) ingested into the Qdrant Cloud free-tier collection used by every visitor on this demo. RBAC is enforced at the Qdrant payload layer — switching personas on the chat page changes which of these chunks actually reach the LLM. Your own uploads live in a separate documents_sess_<sid> collection that auto-purges after 24 h and never lands here.