Record why the timezone regression suite is not needed [ignore_release]

[snake14]

Description

Plugins CI now checks whether a plugin with date or site-timezone logic runs the timezone regression suite (matomo-org/plugin-ci-workflows#22). This plugin's date references cannot produce a wrong site day, so the Plugins CI call records the reason instead of adding a suite, which clears the new coverage warning: Generated visits go through the tracker, which invalidates the site-local day of each visit, so each generator also invalidating the UTC date is only an extra; the direct-to-database generator stores UTC timestamps and invalidates nothing.

No runtime change, so no version bump or changelog entry.

Issue No

Related to matomo-org/plugin-ci-workflows#22

Steps to Replicate the Issue

1. Open this plugin's Plugins CI run on a pull request before this change.
2. Expected: no timezone regression coverage warning.
3. Actual: the timezone safety job warns that the plugin has no timezone regression suite.

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?
• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules
• [NA] Documentation updated?