chore(health): Drop expensive queries from health

Author: shantanuraj

src/app/api/health/route.ts

@@ -5,17 +5,13 @@ export async function GET() {
   try {
     const [stats] = await sql`
       SELECT
-        (SELECT COUNT(*) FROM podcasts) as podcasts_total,
-        (SELECT COUNT(*) FROM episodes) as episodes_total,
         (SELECT COALESCE(SUM(metric_value), 0) FROM poll_metrics
          WHERE metric_name = 'feeds_updated' AND recorded_at > now() - interval '24 hours') as feeds_updated_24h,
         (SELECT COALESCE(SUM(metric_value), 0) FROM poll_metrics
          WHERE metric_name = 'feeds_failed' AND recorded_at > now() - interval '24 hours') as feeds_failed_24h
     `;
 
     return NextResponse.json({
-      podcasts: Number(stats.podcasts_total),
-      episodes: Number(stats.episodes_total),
       polling: {
         updated_24h: Number(stats.feeds_updated_24h),
         failed_24h: Number(stats.feeds_failed_24h),