feat: add isEnterpriseCloud field to user schema

- Added `isEnterpriseCloud` field to the user schema to enhance user differentiation for enterprise cloud services.
- This change supports the ongoing updates to billing and subscription management for enterprise users.

packages/server/src/db/schema/user.ts

@@ -93,6 +93,7 @@ const createSchema = createInsertSchema(user, {
 	trustedOrigins: true,
 	bookmarkedTemplates: true,
 	isValidEnterpriseLicense: true,
+	isEnterpriseCloud: true,
 });
 
 export const apiCreateUserInvitation = createSchema.pick({}).extend({