convert: support prom alertmanagerconfig spec.muteTimeIntervals conve…

[AndrewChubatiuk]

fixes #1783

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Summary by cubic

Adds conversion for AlertmanagerConfig muteTimeIntervals to VMAlertmanagerConfig timeIntervals so mute windows are preserved and applied correctly.

• Bug Fixes
  • Convert names, times, weekdays, daysOfMonth, months, and years from Prometheus MuteTimeIntervals into VM TimeIntervals.
  • Extend tests to validate the conversion and add a changelog entry.

^{Written for commit 8f6f588. Summary will update on new commits.}

[cubic-dev-ai]

1 issue found across 3 files

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="docs/CHANGELOG.md">

<violation number="1" location="docs/CHANGELOG.md:30">
P1: Rule violated: **Changelog Review Agent**

Changelog entry lacks the required before/after user-visible explanation. The rule’s “User-centric explanation” clause requires stating prior behavior and what changed for users; this line only says “support conversion” without explaining the previous missing behavior and the improvement.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[AndrewChubatiuk]

@vrutkovs thanks for review
addressed you comments