ci: disable coverage report for PRs targeting non-main branches

[enoodle]

Description

Coverage baseline only exists for main, so skip the coverage report job for PRs to version branches. Handle missing artifacts gracefully in the post-coverage-comment workflow.

Checklist

• Self-reviewed
• Added/updated tests (if needed)
• Updated documentation (if needed)

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on this repository. Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: d493ca89-a2e5-416d-8de8-a3bf1e4d0d9f

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch erez/fix-backport-coverage-fail

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