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/base.txt

@@ -0,0 +1,20 @@
+Django==4.2.16
+django-tenants==3.7.0
+psycopg[binary]>=3.1.18,<3.3
+django-redis==5.4.0
+celery==5.4.0
+django-celery-beat==2.7.0
+django-celery-results==2.5.1
+django-storages[s3]==1.14.4
+boto3==1.35.0
+cryptography==43.0.0
+whitenoise==6.8.2
+gunicorn==23.0.0
+uvicorn[standard]==0.32.0
+sentry-sdk[django]==2.18.0
+python-decouple==3.8
+Pillow==11.0.0
+djangorestframework==3.15.2
+drf-spectacular==0.27.2
+django-htmx==1.21.0
+django-extensions==3.2.3