Fix PHPStan issues on AI Observability
>>> [!note] Migrated issue
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<!-- Migrated from issue #3563400. -->
Reported by: [marcus_johansson](https://www.drupal.org/user/385947)
Related to !1050
>>>
<p>[Tracker]<br>
<strong>Update Summary: </strong>[One-line status update for stakeholders]<br>
<strong>Short Description: </strong>[One-line issue summary for stakeholders]<br>
<strong>Check-in Date: </strong>MM/DD/YYYY<br>
<em>Metadata is used by the <a href="https://www.drupalstarforge.ai/" title="AI Tracker">AI Tracker.</a> Docs and additional fields <a href="https://www.drupalstarforge.ai/ai-dashboard/docs" title="AI Issue Tracker Documentation">here</a>.</em><br>
[/Tracker]</p>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>In 2.0.x we have upped the phpstan level to 7, this has added a lot of issues that needs to be resolved. We will fix these in steps.</p>
<p>This issue will make sure that AI Observability is fixed.</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Fix all the phpstan issues in AI Observability for 2.x.</p>
> Related issue: [Issue #3558757](https://www.drupal.org/node/3558757)
issue