Render better errors for ENUM validation

lib/pleroma/web/api_spec/render_error.ex

@@ -17,6 +17,9 @@ def init(opts), do: opts
   def call(conn, errors) do
     errors =
       Enum.map(errors, fn
+        %{name: nil, reason: :invalid_enum} = err ->
+          %OpenApiSpex.Cast.Error{err | name: err.value}
+
         %{name: nil} = err ->
           %OpenApiSpex.Cast.Error{err | name: List.last(err.path)}