Fix DB model.

migrations/remove_email_preferences.sql

@@ -0,0 +1,7 @@
+-- Remove all email preference columns from user_preferences table
+-- These columns were not being used and are being removed to clean up the schema
+
+ALTER TABLE user_preferences 
+    DROP COLUMN IF EXISTS email_daily_summary,
+    DROP COLUMN IF EXISTS email_notifications,
+    DROP COLUMN IF EXISTS email_weekly_summary;