All changes are related to Realtime permissions that I observed on support tickets recently: - Migrations can't have `ALTER TABLE realtime.messages`. That's is not allowed and breaks migrations. - Missing realtime.messages partitions are usually due to lack of connections - Errors like "must be owner of table messages" are misleading Closes REAL-1125 ## Additional context https://supabase.slack.com/archives/C01G8CC0X9D/p1789981286693829 and SU-479680 ## Checklist - [x] I have read [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) - [x] If I wrote a new docs topic or edited an existing topic, I used the `/write-the-docs` or `/edit-the-docs` skill, which references [WORD_LIST](https://github.com/supabase/supabase/blob/master/apps/docs/WORD_LIST.md) and the docs [CONTRIBUTING](https://github.com/supabase/supabase/blob/master/apps/docs/CONTRIBUTING.md) guide <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Clarified Realtime authorization restrictions, supported RLS policy management, and the existing RLS configuration for `realtime.messages`. * Documented broadcast partition creation, connection requirements, and warning behavior when partitions are unavailable. * Added troubleshooting guidance for ownership errors, including migration rollback implications and supported remedies. * Added instructions for inspecting message partitions and diagnosing missing, expired, or unavailable partition configurations. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
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