feat: add shared notification, communication, and export services for bookings, courses, and events; introduce btree_gist extension and new booking atomic function

apps/web/supabase/migrations/20260416000004_member_constraints.sql

@@ -17,7 +17,11 @@ UPDATE public.members SET exit_date = entry_date
 UPDATE public.members SET entry_date = current_date
   WHERE entry_date IS NOT NULL AND entry_date > current_date;
 
--- Normalize IBANs in sepa_mandates to uppercase, strip spaces
+-- Normalize IBANs to uppercase, strip spaces (both tables)
+UPDATE public.members
+  SET iban = upper(regexp_replace(iban, '\s', '', 'g'))
+  WHERE iban IS NOT NULL AND iban != '';
+
 UPDATE public.sepa_mandates
   SET iban = upper(regexp_replace(iban, '\s', '', 'g'))
   WHERE iban IS NOT NULL AND iban != '';