feat(user): add dashboard merchant details API for dashboard bootstrap (#12160)
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>
Co-authored-by: likhinbopanna <131246334+likhinbopanna@users.noreply.github.com>