Open WebUI v0.11.2 adds a `request` filter hook that fires before every model call, including post-tool follow-ups

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Released 2026-08-31, v0.11.2 gives filter authors a new `request` step to adjust the payload right before each model call, including the follow-up calls after tool use, while `inlet`, `stream` and `outlet` keep working unchanged. Deployments without pipelines configured (the default) stop paying pipeline setup work on every chat message and background task (#29146), and multi-worker deployments no longer have every worker rewrite the whole model list to the shared cache when a refresh finds it unchanged (#29264). Large Redis-backed websocket deployments also stop checking every outgoing message for file attachments Open WebUI never sends (#28835, #28180).