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

requirements/development.txt

@@ -0,0 +1,13 @@
+-r base.txt
+ruff==0.7.0
+black==24.10.0
+pytest-django==4.9.0
+factory-boy==3.3.1
+pytest-mock==3.14.0
+responses==0.25.3
+pytest-cov==5.0.0
+pytest-xdist==3.6.1
+django-debug-toolbar==4.4.6
+schemathesis==3.36.0
+pytest-playwright==0.6.2
+playwright==1.49.1