fix: Chatterbox uses separate classes per variant, remove turbo

ChatterboxTTS and ChatterboxMultilingualTTS are separate classes.
Turbo variant doesn't exist in chatterbox-tts 0.1.7.
Multilingual generate() requires language_id parameter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

kischdle/llmux/tests/test_config.py

@@ -5,8 +5,8 @@ def test_load_models_config_returns_physical_and_virtual():
     physical, virtual = load_models_config()
     assert isinstance(physical, dict)
     assert isinstance(virtual, dict)
-    assert len(physical) == 9
-    assert len(virtual) == 16
+    assert len(physical) == 8
+    assert len(virtual) == 15
 
 
 def test_physical_model_has_required_fields():

kischdle/llmux/tests/test_model_registry.py

@@ -10,7 +10,7 @@ def registry():
 
 def test_list_virtual_models(registry):
     models = registry.list_virtual_models()
-    assert len(models) == 16
+    assert len(models) == 15
     names = [m["id"] for m in models]
     assert "Qwen3.5-9B-FP8-Thinking" in names
     assert "GPT-OSS-20B-High" in names

kischdle/llmux/tests/test_routes.py

@@ -45,7 +45,7 @@ def test_list_models_returns_16(client, auth_headers):
     assert resp.status_code == 200
     body = resp.json()
     assert body["object"] == "list"
-    assert len(body["data"]) == 16
+    assert len(body["data"]) == 15
 
 
 def test_list_models_contains_expected_names(client, auth_headers):