feat: point the fleet at wss LiveKit room uwh-telhai

Publish and subscribe over wss://livekit.uni-wh.de:7800 and refuse
cleartext ws://. Conference room is uwh-telhai. Includes the uncommitted
encoded H.264 publish path, Rally hairpin, and KMS wall overlay.

tests/test_rally.py

@@ -0,0 +1,36 @@
+import pytest
+from pathlib import Path
+
+from discovery import Camera
+from rally import dante_capture_card, discover_rally, rally_video_node
+from run import fleet_cameras
+from usb_ids import RALLY_IDENTITY
+
+_HAVE_RALLY = rally_video_node() is not None
+
+
+@pytest.mark.skipif(not _HAVE_RALLY, reason="Rally V-R0010 not on USB")
+def test_rally_node_is_pinned_or_uvc():
+    node = rally_video_node()
+    assert node is not None
+    assert Path(node).exists()
+
+
+@pytest.mark.skipif(not _HAVE_RALLY, reason="Rally V-R0010 not on USB")
+def test_discover_rally_not_a_cam_slot():
+    cam = discover_rally()
+    assert cam is not None
+    assert cam.identity == RALLY_IDENTITY
+    assert cam.width == 1920
+    assert cam.height == 1080
+    assert cam.identity != "cam-01"
+    card = dante_capture_card()
+    assert cam.audio_card == card
+
+
+def test_fleet_cameras_drops_rally():
+    cams = [
+        Camera(index=0, identity="cam-01", video_device="/dev/cam01", audio_card=1),
+        Camera(index=20, identity="rally", video_device="/dev/rally", audio_card=0),
+    ]
+    assert [c.identity for c in fleet_cameras(cams)] == ["cam-01"]