Add health endpoints, agents wiring, and deployment updates

src/app/api/health/route.ts

@@ -0,0 +1,17 @@
+import { NextResponse } from 'next/server';
+import { pollServiceHealth, serverConfig } from '@/lib/config';
+
+export async function GET() {
+  const services = await pollServiceHealth();
+  const healthy = services.every((service) => service.status === 'healthy' || service.status === 'not_configured');
+
+  const payload = {
+    status: healthy ? 'ok' : 'degraded',
+    timestamp: new Date().toISOString(),
+    environment: serverConfig.environment,
+    version: process.env.npm_package_version ?? 'unknown',
+    services
+  };
+
+  return NextResponse.json(payload, { status: healthy ? 200 : 503 });
+}