{"-- Clean up recursive and duplicate policies causing infinite recursion

-- chat_thread_participants: drop self-referential SELECT policy
DROP POLICY IF EXISTS \"Participants can view participants of their threads\" ON public.chat_thread_participants","-- chat_thread_participants: drop duplicate super admin policy
DROP POLICY IF EXISTS \"Super admin can manage participants\" ON public.chat_thread_participants","-- chat_thread_participants: drop one of the duplicate INSERT policies (keep the explicit org-based one)
DROP POLICY IF EXISTS \"Org members can add participants to org threads\" ON public.chat_thread_participants","-- chat_threads: drop participant-based SELECT policy to avoid cross-table recursion
DROP POLICY IF EXISTS \"Users can view threads they participate in\" ON public.chat_threads"}