feat: wire adapter registry into worker loop

worker/tests/test_registry.py

@@ -0,0 +1,9 @@
+from lyra_worker.registry import build_adapters
+
+
+def test_registry_returns_the_three_fake_sources():
+    adapters = build_adapters()
+    names = sorted(a.name for a in adapters)
+    assert names == ["qobuz", "soulseek", "youtube"]
+    for a in adapters:
+        assert a.health() is True