[Feature] Models api (#3073)

* add v1/models interface related

* add model parameters

* default model verification

* unit test

* check model err_msg

* unit test

* type annotation

* model parameter in response

* modify document description

* modify document description

* unit test

* verification

* verification update

* model_name

* pre-commit

* update test case

* update test case

* Update tests/entrypoints/openai/test_serving_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/entrypoints/openai/test_serving_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/entrypoints/openai/test_serving_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/entrypoints/openai/test_serving_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update fastdeploy/entrypoints/openai/serving_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: LiqinruiG <37392159+LiqinruiG@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

tests/entrypoints/openai/test_serving_models.py

@@ -0,0 +1,51 @@
+import asyncio
+import unittest
+
+from fastdeploy.entrypoints.openai.protocol import ModelInfo, ModelList
+from fastdeploy.entrypoints.openai.serving_models import ModelPath, OpenAIServingModels
+from fastdeploy.utils import get_host_ip
+
+MODEL_NAME = "baidu/ERNIE-4.5-0.3B-PT"
+MODEL_PATHS = [ModelPath(name=MODEL_NAME, model_path=MODEL_NAME)]
+MAX_MODEL_LEN = 2048
+
+
+async def _async_serving_models_init() -> OpenAIServingModels:
+    """Asynchronously initialize an OpenAIServingModels instance."""
+    return OpenAIServingModels(
+        model_paths=MODEL_PATHS,
+        max_model_len=MAX_MODEL_LEN,
+        ips=get_host_ip(),
+    )
+
+
+class TestOpenAIServingModels(unittest.TestCase):
+    """Unit test for OpenAIServingModels"""
+
+    def test_serving_model_name(self):
+        """Test model name retrieval"""
+        # 通过 asyncio.run() 执行异步初始化
+        serving_models = asyncio.run(_async_serving_models_init())
+        self.assertEqual(serving_models.model_name(), MODEL_NAME)
+
+    def test_list_models(self):
+        """Test the model listing functionality"""
+        serving_models = asyncio.run(_async_serving_models_init())
+
+        # 通过 asyncio.run() 执行异步方法
+        result = asyncio.run(serving_models.list_models())
+
+        # 验证返回类型和内容
+        self.assertIsInstance(result, ModelList)
+        self.assertEqual(len(result.data), 1)
+
+        model_info = result.data[0]
+        self.assertIsInstance(model_info, ModelInfo)
+        self.assertEqual(model_info.id, MODEL_NAME)
+        self.assertEqual(model_info.max_model_len, MAX_MODEL_LEN)
+        self.assertEqual(model_info.root, MODEL_PATHS[0].model_path)
+        self.assertEqual(result.object, "list")
+
+
+if __name__ == "__main__":
+    unittest.main()