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>

services/worker-gpu/app/celery_app.py

@@ -0,0 +1,38 @@
+"""Celery приложение GPU воркера."""
+
+from celery import Celery
+from celery.utils.log import get_task_logger
+
+from app.config import settings
+
+celery_app = Celery(
+    "worker_gpu",
+    broker=settings.RABBITMQ_URL,
+    backend=settings.REDIS_URL,
+    include=["app.tasks.search", "app.tasks.plagiarism"],
+)
+
+celery_app.conf.update(
+    task_serializer="json",
+    result_serializer="json",
+    accept_content=["json"],
+    timezone="Europe/Moscow",
+    enable_utc=True,
+    task_track_started=True,
+    # Маршрутизация
+    task_routes={
+        "gpu.*": {"queue": "queue.gpu"},
+        "index.*": {"queue": "queue.index"},
+        "notify.*": {"queue": "queue.notify"},
+        "gost.*": {"queue": "queue.gost"},
+    },
+    # Надёжность
+    task_acks_late=True,
+    task_reject_on_worker_lost=True,
+    # GPU воркер — только 1 процесс
+    worker_concurrency=1,
+    # Результаты хранить 24 часа
+    result_expires=86400,
+)
+
+logger = get_task_logger(__name__)