[Build] refactor: Rebuild PUT handler for ResellerProfile direct management

## GitHub Update **Repository:** [MKWcorp/drwskincare](https://github.com/MKWcorp/drwskincare) **Author:** mulmeddrwcorp **Date:** 8/14/2025, 1:12:43 PM **Commit:** [`fc65ce1`](https://github.com/MKWcorp/drwskincare/commit/fc65ce182b83e532af24d98bb5dc4cd001b26c62) ### Commit Message refactor: Rebuild PUT handler for ResellerProfile direct management - Use prisma.resellerProfile.upsert() for direct profile operations - Simplify logic by working directly with ResellerProfile model - Support all profile fields: displayName, city, whatsappNumber, facebook, instagram, bio, photoUrl, isPublic, customSlug - Proper error handling with detailed responses - Clean separation between core Reseller data and user-editable profile data --- _This story was imported from historical commits._