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_audio_gate.py

@@ -0,0 +1,73 @@
+"""Hop energy gate so neighboring C920s do not publish bleed."""
+import numpy as np
+
+from audio_gate import HopGate, gate_enabled_for, rms_dbfs
+
+
+def _sine(n=1600, amp=8000):
+    return (np.sin(2 * np.pi * 440 * np.arange(n) / 16000) * amp).astype(np.int16)
+
+
+def test_rms_dbfs_silence_is_floor():
+    assert rms_dbfs(np.zeros(1600, dtype=np.int16)) <= -120.0
+
+
+def test_rms_dbfs_sine_is_near_minus_15():
+    db = rms_dbfs(_sine())
+    assert -16.5 < db < -14.0
+
+
+def test_gate_silences_quiet_hop():
+    g = HopGate(open_db=-32.0, close_db=-40.0, hold_hops=3)
+    quiet = (np.random.randn(1600) * 80).astype(np.int16)
+    out = g.apply(quiet)
+    assert int(np.max(np.abs(out))) == 0
+    assert g.open is False
+
+
+def test_gate_passes_loud_hop():
+    g = HopGate(open_db=-32.0, close_db=-40.0, hold_hops=3)
+    loud = _sine()
+    out = g.apply(loud)
+    assert int(np.max(np.abs(out))) > 1000
+    assert g.open is True
+
+
+def test_gate_hold_then_closes():
+    g = HopGate(open_db=-32.0, close_db=-40.0, hold_hops=2)
+    g.apply(_sine())
+    quiet = np.zeros(1600, dtype=np.int16)
+    assert int(np.max(np.abs(g.apply(quiet)))) == 0 or g.open is True
+    g.apply(quiet)
+    g.apply(quiet)
+    assert g.open is False
+    assert int(np.max(np.abs(g.apply(quiet)))) == 0
+
+
+def test_gate_skips_rally():
+    assert gate_enabled_for("rally", "rally", True) is False
+    assert gate_enabled_for("cam-07", "rally", True) is True
+    assert gate_enabled_for("cam-07", "rally", False) is False
+
+
+def test_cleaner_gates_quiet_after_dsp():
+    from audio_cleanup import AudioCleaner
+    c = AudioCleaner(mode="off", beamform="off", gate=HopGate(open_db=-32.0, close_db=-40.0, hold_hops=1))
+    quiet = (np.random.randn(1600) * 80).astype(np.int16)
+    out = c.process(quiet)
+    assert out.shape == (1600,)
+    assert int(np.max(np.abs(out))) == 0
+    loud = _sine(1600, 8000)
+    out = c.process(loud)
+    assert int(np.max(np.abs(out))) > 1000
+
+
+def test_cleaner_gate_uses_raw_energy_not_dsp_makeup():
+    """Room floor ~-34 dBFS must stay closed even though DSP makeup is ~+3 dB."""
+    from audio_cleanup import AudioCleaner
+    c = AudioCleaner(mode="off", beamform="off", gate=HopGate(open_db=-32.0, close_db=-40.0, hold_hops=1))
+    # sine RMS -34 dBFS => amplitude ~924
+    floor = _sine(1600, 924)
+    assert -35.5 < rms_dbfs(floor) < -32.5
+    out = c.process(floor)
+    assert int(np.max(np.abs(out))) == 0