feat: integrate all 10 skills into homelab-topology

- Added api-security-hardening (helmet, rate limits)
- Added nodejs-backend-patterns (error handling)
- Added observability-monitoring (pino logging)
- Added websocket-engineer (socket.io real-time updates)
- Added docker (Multi-stage build, compose)
- Added vitest (testing configuration and store tests)
- Added data-visualizer (MetricsBar and HostChart)
- Added infrastructure-monitoring/proxmox-admin/network-engineer types
- Fixed UI accessibility and styling
- Cleaned up node_modules tracking

server/middleware/requestLogger.ts

@@ -0,0 +1,42 @@
+import { Request, Response, NextFunction } from 'express';
+import pino from 'pino';
+
+/**
+ * Pino structured logger.
+ * - Development: colorized, human-readable output
+ * - Production: JSON for log aggregation
+ */
+export const logger = pino({
+    level: process.env.LOG_LEVEL || 'info',
+    ...(process.env.NODE_ENV !== 'production' && {
+        transport: {
+            target: 'pino-pretty',
+            options: { colorize: true },
+        },
+    }),
+});
+
+/**
+ * Request logging middleware.
+ * Logs method, url, status, and duration for every request.
+ */
+export const requestLogger = (
+    req: Request,
+    res: Response,
+    next: NextFunction
+) => {
+    const start = Date.now();
+
+    res.on('finish', () => {
+        const duration = Date.now() - start;
+        logger.info({
+            method: req.method,
+            url: req.url,
+            status: res.statusCode,
+            duration: `${duration}ms`,
+            ip: req.ip,
+        });
+    });
+
+    next();
+};