feat: add real yt-dlp client and opt-in live test; ffmpeg in worker image

worker/tests/test_youtube_live.py

@@ -0,0 +1,16 @@
+import os
+
+import pytest
+
+from lyra_worker.adapters._ytdlp import YtDlpClient
+
+pytestmark = pytest.mark.skipif(
+    not os.environ.get("LYRA_LIVE_TESTS"),
+    reason="live network test; set LYRA_LIVE_TESTS=1 to run",
+)
+
+
+def test_live_search_returns_results():
+    results = YtDlpClient().search_album("Radiohead", "In Rainbows")
+    assert len(results) >= 1
+    assert all(r["source_ref"] for r in results)