עדכון pydantic-ai v2.54.0

תקציר מקורי באנגלית<h2>What's Changed</h2> <h3><g-emoji class="g-emoji" alias="warning">⚠️</g-emoji> Compatibility Notes</h3> <ul> <li>Handle draft-7 list-form <code>items</code> in <code>JsonSchemaTransformer</code>, <code>TestModel</code> and Mistral streamed output, and make <code>TestModel</code> accept boolean subschemas and cap <code>prefixItems</code> at <code>maxItems</code> by <a class="user-mention notranslate" data-hovercard-type="user" data-hovercard-url="/users/dsfaccini/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/dsfaccini">@dsfaccini</a> in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="5667304876" data-permission-text="Title is private" data-url="https://github.com/pydantic/pydantic-ai/is