Standardize Prism Console service metadata and health endpoints

src/app/api/health/route.ts

@@ -1,13 +1,16 @@
 import { NextResponse } from 'next/server';
 import { pollServiceHealth, serverConfig } from '@/lib/config';
+import { SERVICE_ID } from '@/config/serviceConfig';
 
 export async function GET() {
   const services = await pollServiceHealth();
   const healthy = services.every((service) => service.status === 'healthy' || service.status === 'not_configured');
 
   const payload = {
+    ok: healthy,
+    service: SERVICE_ID,
+    ts: new Date().toISOString(),
     status: healthy ? 'ok' : 'degraded',
-    timestamp: new Date().toISOString(),
     environment: serverConfig.environment,
     version: process.env.npm_package_version ?? 'unknown',
     services