docs(02): create phase 2 authentication & multi-tenancy plans
5 plans across 4 waves covering all 9 requirements (AUTH-01..06, TNNT-01..03)
and 18 locked decisions (D-01..D-18):
- Plan 01 (W1): Backend auth foundation with Prisma schema, RLS, JWT, admin seed
- Plan 02 (W2): Frontend auth flow, login page, user/tenant CRUD admin pages
- Plan 03 (W2): SUS package verification, password reset, force-change interceptor
- Plan 04 (W3): LDAP sync service, per-tenant config, field mapping, admin UI
- Plan 05 (W4): Visual verification of complete auth and multi-tenancy system
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
schalli
e8e89686f5