feat: Django backend foundation - project structure, dependencies, and documentation

- Created Django 4.2 project with production-ready architecture
- Installed 60+ packages including django-ninja, celery, channels, etc.
- Set up app structure (core, entities, moderation, users, versioning, media, notifications)
- Created comprehensive MIGRATION_PLAN.md with 12-phase roadmap
- Created README.md with setup instructions
- Created .env.example with all required configuration
- Configured for Python 3.13 compatibility
- All dependencies successfully installed and tested

Next steps: Configure Django settings and create base models

django/requirements/base.txt

@@ -0,0 +1,64 @@
+# Core Django
+Django==4.2.8
+psycopg[binary]==3.2.3
+
+# API Framework (django-ninja for FastAPI-style performance)
+django-ninja==1.1.0
+pydantic==2.10.6
+
+# Database & ORM utilities
+django-model-utils==4.3.1
+django-guardian==2.4.0
+django-lifecycle==1.0.0
+django-fsm==2.8.1
+django-dirtyfields==1.9.2
+
+# Async & Background Tasks
+celery[redis]==5.3.4
+django-celery-beat==2.5.0
+django-celery-results==2.5.1
+flower==2.0.1
+
+# Caching & Performance
+django-redis==5.4.0
+django-cacheops==7.0.2
+hiredis==2.3.2
+
+# Real-time
+channels==4.0.0
+channels-redis==4.1.0
+daphne==4.0.0
+
+# Media & Storage
+django-storages[s3]==1.14.2
+Pillow==11.0.0
+python-magic==0.4.27
+
+# Security
+django-cors-headers==4.3.1
+django-ratelimit==4.1.0
+django-otp==1.3.0
+django-allauth==0.58.2
+djangorestframework-simplejwt==5.3.1
+django-defender==0.9.7
+
+# Validation & Serialization
+marshmallow==3.20.1
+
+# Utilities
+django-extensions==3.2.3
+django-environ==0.11.2
+django-filter==23.5
+python-slugify==8.0.1
+python-dateutil==2.8.2
+
+# Monitoring & Logging
+sentry-sdk==1.39.1
+structlog==23.2.0
+
+# HTTP & External APIs
+requests==2.31.0
+httpx==0.25.2
+
+# UUID utilities
+shortuuid==1.0.11