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

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+# 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

django/requirements/local.txt

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+-r base.txt
+
+# Development & Debugging
+django-debug-toolbar==4.2.0
+django-silk==5.0.4
+ipython==8.18.1
+ipdb==0.13.13
+
+# Testing
+pytest==7.4.3
+pytest-django==4.7.0
+pytest-cov==4.1.0
+pytest-xdist==3.5.0
+factory-boy==3.3.0
+Faker==20.1.0
+coverage==7.3.3
+
+# Code Quality
+black==23.12.1
+flake8==6.1.0
+isort==5.13.2
+mypy==1.7.1
+django-stubs==4.2.7

django/requirements/production.txt

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+-r base.txt
+
+# Production Web Server
+gunicorn==21.2.0
+whitenoise==6.6.0
+
+# Production monitoring
+django-prometheus==2.3.1
+
+# Security
+cryptography==41.0.7