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/api/alembic/env.py

@@ -0,0 +1,90 @@
+"""Alembic env.py — настройка среды для миграций (async режим)."""
+
+import asyncio
+import os
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+
+# Импорт всех моделей для автоопределения изменений
+from app.database import Base
+import app.models  # noqa: F401 — регистрирует все модели
+
+# Alembic Config
+config = context.config
+
+# Настройка логирования
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# Целевые метаданные для автогенерации
+target_metadata = Base.metadata
+
+# Читаем DATABASE URL из переменной окружения (синхронный psycopg2 для Alembic)
+def get_url() -> str:
+    host = os.getenv("POSTGRES_HOST", "postgres")
+    port = os.getenv("POSTGRES_PORT", "5432")
+    db = os.getenv("POSTGRES_DB", "antiplagiator")
+    user = os.getenv("POSTGRES_USER", "antiplagiator")
+    password = os.getenv("POSTGRES_PASSWORD", "changeme")
+    return f"postgresql+psycopg2://{user}:{password}@{host}:{port}/{db}"
+
+
+def run_migrations_offline() -> None:
+    """Запустить миграции в 'offline' режиме (без реального соединения с БД)."""
+    url = get_url()
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        compare_type=True,
+        compare_server_default=True,
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    """Выполнить миграции с реальным соединением."""
+    context.configure(
+        connection=connection,
+        target_metadata=target_metadata,
+        compare_type=True,
+        compare_server_default=True,
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations() -> None:
+    """Запустить миграции в async режиме."""
+    configuration = config.get_section(config.config_ini_section) or {}
+    configuration["sqlalchemy.url"] = get_url()
+
+    connectable = async_engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+
+def run_migrations_online() -> None:
+    """Запустить миграции в 'online' режиме."""
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()