Initial commit: backend scaffold, auth, frontend login

- FastAPI + SQLAlchemy async + Alembic + Postgres backend
- Auth: JWT access + rotating refresh tokens, argon2, roles, audit log
- React 19 + Vite frontend: login page, protected route, auth context
- Docker Compose: postgres, redis, migrate, api, worker (placeholder), frontend/nginx

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/app/api/v1/router.py

@@ -0,0 +1,10 @@
+"""Сборка роутеров версии v1."""
+
+from fastapi import APIRouter
+
+from app.api.v1 import auth, health, users
+
+api_router = APIRouter()
+api_router.include_router(health.router)
+api_router.include_router(auth.router)
+api_router.include_router(users.router)