[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>

fastdeploy/engine/args_utils.py

@@ -50,6 +50,10 @@ class EngineArgs:
     """
     The name or path of the model to be used.
     """
+    served_model_name: Optional[str] = None
+    """
+    The name of the model being served.
+    """
     revision: Optional[str] = "master"
     """
     The revision for downloading models.
@@ -379,6 +383,12 @@ class EngineArgs:
             default=EngineArgs.model,
             help="Model name or path to be used.",
         )
+        model_group.add_argument(
+            "--served-model-name",
+            type=nullable_str,
+            default=EngineArgs.served_model_name,
+            help="Served model name",
+        )
         model_group.add_argument(
             "--revision",
             type=nullable_str,