[AIBundle] Fix profiler with non-string tool results

[valtzu]

Q	A
Bug fix?	yes
New feature?	no
Docs?	no
License	MIT

Fix the following issue in Symfony AI profiler view which appears when using blog demo which has a clock tool returning a DatePoint instance:

An exception has been thrown during the rendering of a template ("nl2br(): Argument #1 ($string) must be of type string, Symfony\Component\Clock\DatePoint given") in @AI/data_collector.html.twig at line 242

[chr-hertel]

Works 👍

[chr-hertel]

Thank you @valtzu.