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

.gitignore

@@ -0,0 +1,56 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+*.egg-info/
+.eggs/
+build/
+dist/
+
+# Environment
+.env
+.env.local
+.env.*.local
+.venv/
+venv/
+
+# Sisyphus session state
+.sisyphus/
+
+# Django
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+media/
+staticfiles/
+
+# Tailwind build output
+static/css/output.css
+
+# Frontend
+node_modules/
+
+# OS / Editor
+.DS_Store
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Testing / coverage
+.pytest_cache/
+.coverage
+.coverage.*
+htmlcov/
+coverage.xml
+.tox/
+
+# Tooling caches
+.ruff_cache/
+.mypy_cache/
+
+# Generated artifacts
+openapi.json