feat: scaffold Django multi-tenant project with 5 of 9 apps
Phase 1 scaffolding: config/, core/, base models, AES-256-GCM phone encryption, enums mirror
apps.tenant: Tenant + Domain (django-tenants)
apps.org: 11 models (OrgUnit hierarchy, Staff, audit logs)
apps.account: 4 models (UserAccount as AUTH_USER_MODEL, login/password tracking)
apps.permission: 7 models (RBAC + overrides + datascope + append-only changelog)
apps.region: 5 models (District, BusinessArea, MetroLine, MetroStation, School)
All migrations generated, manage.py check passes
ishenwei
9a7d06b34e