Initial scaffold: FastAPI backend + Vue 3 frontend + Docker setup

Backend: config/db/security/logging core, SQLAlchemy models (Server,
Credential, UpdateJob, UpdateLog, AuditLog, User), services (winrm, ssh,
cau, audit, job_runner), REST API (auth, servers, updates, audit),
Socket.io WebSocket layer.
Frontend: Vue 3 + TS + Pinia + Tailwind, Views (Dashboard, Servers,
Updates, Audit, Login), axios + socket.io-client, nginx prod config.

backend/app/api/__init__.py

@@ -0,0 +1,11 @@
+"""API routers."""
+
+from fastapi import APIRouter
+
+from app.api.routes import audit, auth, servers, updates
+
+api_router = APIRouter(prefix="/api")
+api_router.include_router(auth.router, prefix="/auth", tags=["auth"])
+api_router.include_router(servers.router, prefix="/servers", tags=["servers"])
+api_router.include_router(updates.router, prefix="/updates", tags=["updates"])
+api_router.include_router(audit.router, prefix="/audit", tags=["audit"])