Add missing on_delete: :cascade on notification_policies (#30251)

db/migrate/20240510192043_fix_notification_policies_foreign_key.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class FixNotificationPoliciesForeignKey < ActiveRecord::Migration[7.1]
+  def up
+    safety_assured do
+      execute <<~SQL.squish
+        ALTER TABLE notification_policies
+          DROP CONSTRAINT fk_rails_506d62f0da,
+          ADD CONSTRAINT fk_rails_506d62f0da
+            FOREIGN KEY (account_id)
+            REFERENCES accounts(id)
+            ON DELETE CASCADE
+      SQL
+    end
+  end
+
+  def down
+    safety_assured do
+      execute <<~SQL.squish
+        ALTER TABLE notification_policies
+          DROP CONSTRAINT fk_rails_506d62f0da,
+          ADD CONSTRAINT fk_rails_506d62f0da
+            FOREIGN KEY (account_id)
+            REFERENCES accounts(id)
+      SQL
+    end
+  end
+end