feat(copyWithProgress): report copy progress every second instead of every 1%

tests/quick-logic-test.js

@@ -266,6 +266,7 @@ const AUDIO_INPUTS = {
   ok(copyHelperCode.includes('fs.unlinkSync(destination)'), 'copy helper removes partial copies before retrying');
   ok(copyHelperCode.includes('formatEta'), 'copy helper formats ETA');
   ok(copyHelperCode.includes('updateWorker'), 'copy helper updates Tdarr worker progress');
+  ok(copyHelperCode.includes('PROGRESS_INTERVAL_MS = 1000'), 'copy helper reports progress every 1 second (1000ms)');
 
   // ── Subtitle default naming checks ─────────────────────────────────────────
   console.log('\n── Subtitle default naming rules ────────────────────');