[Full Duplex] Feat: Support Full-Duplex realtime runtime & add MiniCPM-o 4.5 demo (#3907)

Signed-off-by: Sy03 <1370724210@qq.com>
Signed-off-by: lishunyang12 <lishunyang03@gmail.com>
Signed-off-by: Yueqian Lin <linyueqian@outlook.com>
Co-authored-by: lishunyang12 <lishunyang03@gmail.com>
Co-authored-by: Yueqian Lin <linyueqian@outlook.com>
Co-authored-by: StormMelody <22371184@zju.edu.cn>
Co-authored-by: Gao Han <hgaoaf@connect.ust.hk>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/entrypoints/openai_api/test_duplex_capability.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+import ast
+from pathlib import Path
+
+import pytest
+
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
+
+def test_api_server_does_not_import_experimental_duplex_at_module_load() -> None:
+    api_server = Path(__file__).parents[3] / "vllm_omni/entrypoints/openai/api_server.py"
+    module = ast.parse(api_server.read_text())
+
+    top_level_imports = {
+        node.module for node in module.body if isinstance(node, ast.ImportFrom) and isinstance(node.module, str)
+    }
+
+    assert not any(module.startswith("vllm_omni.experimental.fullduplex") for module in top_level_imports)