feat: Add guest bookings partial index for active and hotel_id

Author: zaydaanjahangir

backend/supabase/migrations/20260326050118_guest-bookings-hotel-id-active-index.sql

@@ -1,5 +1,4 @@
--- Partial index on guest_bookings for active bookings by hotel
--- Covers the common query pattern: hotel_id AND status = 'active'
+-- Partial index on guest_bookings for active bookings by hotel"
 create index if not exists idx_guest_bookings_hotel_id_active
   on public.guest_bookings(hotel_id)
   where status = 'active';