Single select field use enum name as title instead of provided parameter (since Pydantic 2.9.0)

[elio2t]

Description

After upgrading to Pydantic version 2.9, I encountered an issue where single select fields in FastUI are using the enum name as the title, rather than the custom title provided as a parameter:

It seems to be linked to this update: pydantic/pydantic#10029

Schema before:

{
   "select_single": {
    "allOf": [{ "$ref": "#/$defs/ToolEnum" }],
    "title": "Select Single"
  },
  ...
}

Schema after:

{
  "select_single": { "$ref": "#/$defs/ToolEnum", "title": "Select Single" },
  ...
}

This seems to cause a different behaviour in the deference_json_schema function and results in the title being overwritten.

Environment

FastUI version: 0.7.0
Pydantic version: 2.9.0
Python version: 3.12.4