Add startup, search and play timing marks plus yt-dlp duration logs

server/server.js

@@ -143,6 +143,9 @@ const CHANNEL_LIMIT = 60;
 function runYtdlp(args, { signal } = {}) {
   return new Promise((resolve, reject) => {
     const child = spawn(YTDLP, args, { stdio: ['ignore', 'pipe', 'pipe'] });
+    const t0 = Date.now();
+    const kind = String(args.find((a) => /^ytsearch|^https?:/.test(String(a))) || args[0] || '')
+      .replace(/^ytsearch\d*:.*/, 'search').replace(/^https?:\/\/[^/]+\/watch.*/, 'video').slice(0, 40);
     // Kill the download when the requesting client goes away — otherwise an
     // aborted/retried save leaves yt-dlp running to completion (8 copies of
     // one video were found pulling in parallel after the client retried).
@@ -158,6 +161,7 @@ function runYtdlp(args, { signal } = {}) {
     child.stderr.on('data', (d) => { err += d; });
     child.on('error', (e) => reject(new Error('yt-dlp not found: ' + e.message)));
     child.on('close', (code) => {
+      console.log(`[ytdlp] ${kind} ${Date.now() - t0}ms ${code === 0 ? 'ok' : 'fail'}`);
       if (code !== 0) reject(new Error(err.trim() || 'yt-dlp exited with code ' + code));
       else resolve(out);
     });