Add policy to allow public access to event RSVPs

Author: zealsprince

supabase/migrations/20251216050325_rsvp_public.sql

@@ -0,0 +1,8 @@
+-- Drop prior authenticated-read policy so only anon policy remains
+DROP POLICY IF EXISTS "Users can SELECT events_rsvps" ON public.events_rsvps;
+
+-- Allow anonymous users to read event RSVPs (public view access)
+CREATE POLICY "Everyone can SELECT events_rsvps" ON public.events_rsvps
+  FOR SELECT TO anon, authenticated
+    USING (TRUE);
+