Avoid incorrectly forcing new visit when AI Assistants provide utm_source parameter

[sgiehl]

Description

If A visitor currently comes from ChatGPT to a website, ChatGPT might attach utm_source=chatgpt.com to the url. Matomo and this plugin are currently not considering this parameter for new visits, if it can be detected as AI Assistant.

However, if the utm_source parameter persists, e.g. after page reload, the plugin might currently force a new visit. This should be avoided, unless new campaign parameters are provided, that don't resolve to an AI Assistant.

fixes matomo-org/matomo#23708

Issue No

Steps to Replicate the Issue

Checklist

• [✔/✖] Tested locally or on demo2/demo3?
• [✔/✖/NA] New test case added/updated?
• [✔/✖/NA] Are all newly added texts included via translation?
• [✔/✖/NA] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [✔/✖/NA] Version bumped?

[AltamashShaikh]

@sgiehl The testing worked fine for me, can you update the release version, next release date is 2025-11-10