feat: batch emails for SLA missed events

[scmmishra]

Pull Request Template

Description

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Type of change

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality not to work as expected)
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Checklist:

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[linear[bot]]

CW-3162 Can we combine the notifications together into one email if there are multiple notifications?

[scmmishra]

Closing for now, will re-open as requried

[github-actions[bot]]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.