Describe 6.9: places in memories, deaths and state on the backend, sealing, the new retention Memory and traces, Security and privacy, HTTP API, settings, and environment pages follow the backend: what is sealed and how, an owner's audited look at one run, export links, consent's hash and age answer, Infinity, and the new defaults. Pages that still described Redis no longer do.
Keep sessions in MongoDB and describe the move from Redis (server 6.8)
Write the wiki