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.

frontend/vite.config.ts

@@ -0,0 +1,26 @@
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+import path from 'path'
+
+export default defineConfig({
+  plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  server: {
+    port: 3000,
+    host: true,
+    proxy: {
+      '/api': {
+        target: 'http://backend:8000',
+        changeOrigin: true,
+      },
+      '/ws': {
+        target: 'ws://backend:8000',
+        ws: true,
+      },
+    },
+  },
+})