[Blocker] Fix SSO login duplicate user issue and add user merge utilities

## GitHub Update **Repository:** [MKWcorp/berkomunitas](https://github.com/MKWcorp/berkomunitas) **Author:** multimediadrw **Date:** 2/9/2026, 5:08:05 PM **Commit:** [`f796f0a`](https://github.com/MKWcorp/berkomunitas/commit/f796f0a7ecf6412b54a9a7be5fe6a573dec9074c) ### Commit Message Fix SSO login duplicate user issue and add user merge utilities - Fix SSO Google login to prioritize email search over google_id - Prevents duplicate user creation when admin changes user email - Add email-first lookup in google-login route to find existing users - Add user merge script to consolidate duplicate accounts - Add verification scripts for checking user status and email duplicates - Admin email update now works correctly with member_emails table - Merged user 516 into user 24 with proper data transfer --- _This story was imported from historical commits._