feat(MED-123): fix medreport.notifications.body only allows 5000 chars, cannot log longer emails

supabase/migrations/20250818150655_notification_max_length_fix.sql

@@ -0,0 +1,2 @@
+-- Increase the body column limit for notifications to support larger email content (up to 128KB)
+ALTER TABLE medreport.notifications ALTER COLUMN body TYPE VARCHAR(131072);