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_annexb.py

@@ -0,0 +1,23 @@
+"""Annex-B access-unit split."""
+from annexb import AnnexBSplitter, is_keyframe, nal_unit_type
+
+
+def test_splitter_emits_complete_nal():
+    s = AnnexBSplitter()
+    assert s.push(b"") == []
+    first = b"\x00\x00\x00\x01\x67SPS"
+    second = b"\x00\x00\x00\x01\x68PPS"
+    assert s.push(first + second) == [first]
+    assert s.push(b"\x00\x00\x00\x01\x65IDR") == [second]
+
+
+def test_is_keyframe_idr():
+    au = b"\x00\x00\x00\x01\x67\x00\x00\x00\x01\x65\x88"
+    assert is_keyframe(au) is True
+    assert nal_unit_type(au) == 7
+
+
+def test_is_keyframe_delta():
+    au = b"\x00\x00\x00\x01\x41\x00"
+    assert is_keyframe(au) is False
+    assert nal_unit_type(au) == 1