SLA should be automatically calculated after JSON import if they contain issue history

Problem Description

Currently, when issues are created via JSON import into a JSM project, they don't show the SLA values in the issue view. They need to be recalculated via REST calls as mentioned in this article https://confluence.atlassian.com/jirakb/slas-in-jira-service-management-are-missing-or-disappear-954252774.html

Suggested resolution

The suggestion is to add this functionality in JSON import by default.

Notes

SLA calculation works by getting the issue events from the issue history and calculating it accordingly. CSV import does not support issue history import (only JSON import), hence imported issues via CSV will never have SLA since those issues do not have history.