feat: initial microservices project structure

Services:
- api: FastAPI gateway with JWT auth, async endpoints, WebSocket
- worker-gpu: CUDA sentence-transformers, FAISS IVFFlat, Ollama LLM
- worker-indexer: Winnowing+MinHash plagiarism detection, PDF/DOCX extraction
- worker-notifier: SMTP email notifications
- worker-gost: GOST 7.1-2003 and GOST R 7.0.5-2008 formatting

Infrastructure:
- docker-compose.yml (production) + docker-compose.dev.yml (hot reload)
- Nginx reverse proxy + WebSocket support
- PostgreSQL 16 with Alembic migrations
- Elasticsearch 8 with Russian/English analyzers
- MinIO, RabbitMQ, Redis, Ollama

Frontend:
- React 18 + Vite + TypeScript + TailwindCSS + Zustand + React Query v5
- 9 pages: Home, Search, Cabinet, Task, Check, Bibliography, Pricing, Login, Register

Scripts:
- Parser stubs: OpenAlex, КиберЛенинка, arXiv (Phase 0 - to be filled)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,40 @@
+# PostgreSQL
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+POSTGRES_DB=antiplagiator
+POSTGRES_USER=antiplagiator
+POSTGRES_PASSWORD=changeme
+
+# Redis
+REDIS_URL=redis://redis:6379/0
+
+# RabbitMQ
+RABBITMQ_URL=amqp://guest:guest@rabbitmq:5672/
+
+# MinIO
+MINIO_ENDPOINT=minio:9000
+MINIO_ACCESS_KEY=minioadmin
+MINIO_SECRET_KEY=changeme
+MINIO_BUCKET_DOCS=documents
+MINIO_BUCKET_BACKUPS=backups
+
+# Elasticsearch
+ELASTICSEARCH_URL=http://elasticsearch:9200
+
+# Ollama
+OLLAMA_URL=http://ollama:11434
+
+# JWT
+SECRET_KEY=change-me-in-production-use-openssl-rand-hex-32
+ACCESS_TOKEN_EXPIRE_MINUTES=10080
+
+# SMTP (Yandex)
+SMTP_HOST=smtp.yandex.ru
+SMTP_PORT=465
+SMTP_USER=noreply@jze9.ru
+SMTP_PASSWORD=changeme
+SMTP_FROM=noreply@jze9.ru
+
+# App
+APP_URL=https://academic.jze9.ru
+ENVIRONMENT=development