Add support for data-modeler-api-model-id attribute
>>> [!note] Migrated issue
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<!-- Migrated from issue #3538738. -->
Reported by: [jurgenhaas](https://www.drupal.org/user/168924)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Some model owners (e.g. AI Agents) need to define the model ID in some other field which is not coming from the meta data. For those, there is now the <code>data-modeler-api-model-id</code> attribute for config fields on plugins, and if that is set to 1, its value is meant to be the model ID. See also <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/ai_agents/-/work_items/3538736" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/ai_agents/-/work_items/3538736</a></span></p>
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