`ValidSchema` reports incorrect validation error when block in preset is disabled

Describe the bug
I'm copying some json from a template over to some schema presets and getting a theme check ValidSchema error with the wrong message.

Source

// sections/test.liquid

{% schema %}
{
  "name": "Test",
  "blocks": [{ "type": "@theme" }],
  "presets": [
    {
      "name": "Preset",
      "blocks": {
        "button": {
          "type": "button",
          "disabled": true
        }
      }
    }
  ]
}
{% endschema %}

Expected behaviour
"disabled": true is reported as invalid.
Theme Check flags a more useful error.

For what it's worth while I think this should be flagged as invalid, it is actually accepted by the platform, despite being useless.

Actual behaviour
The entire "blocks" value under the "Preset" preset throws an ValidSchema error with the message in the screenshot

Debugging information

• OS: macOS
• OS Version: Sequoia 15.2
• Theme Check Version: Unknown, according to CLI. I have @shopify/cli@3.74.0 installed though so whichever version is used by that

Reproduce the ValidSchema error using the sections/test.liquid example and inspect how the preset's blocks value is validated. Confirm that the diagnostic points specifically to "disabled": true rather than reporting the entire blocks value, then verify the corrected message with the same theme check.