feat(api): implement user agent parameters in Gradient and AsyncGradient classes to fix failing tests

Author: bnarasimha21

src/gradient/_client.py

@@ -299,6 +299,8 @@ def copy(
         set_default_headers: Mapping[str, str] | None = None,
         default_query: Mapping[str, object] | None = None,
         set_default_query: Mapping[str, object] | None = None,
+        user_agent: str | None = None,
+        user_agent_version: str | None = None,
         _extra_kwargs: Mapping[str, Any] = {},
     ) -> Self:
         """
@@ -335,6 +337,8 @@ def copy(
             max_retries=max_retries if is_given(max_retries) else self.max_retries,
             default_headers=headers,
             default_query=params,
+            user_agent=user_agent or self._user_agent_name,
+            user_agent_version=user_agent_version or self._user_agent_version,
             **_extra_kwargs,
         )
         client._base_url_overridden = self._base_url_overridden or base_url is not None
@@ -608,6 +612,8 @@ def copy(
         set_default_headers: Mapping[str, str] | None = None,
         default_query: Mapping[str, object] | None = None,
         set_default_query: Mapping[str, object] | None = None,
+        user_agent: str | None = None,
+        user_agent_version: str | None = None,
         _extra_kwargs: Mapping[str, Any] = {},
     ) -> Self:
         """
@@ -644,6 +650,8 @@ def copy(
             max_retries=max_retries if is_given(max_retries) else self.max_retries,
             default_headers=headers,
             default_query=params,
+            user_agent=user_agent or self._user_agent_name,
+            user_agent_version=user_agent_version or self._user_agent_version,
             **_extra_kwargs,
         )
         client._base_url_overridden = self._base_url_overridden or base_url is not None