Increase the lifespan of Pull request entities ingested using the Azure Devops Ocean Integration. Currently these entities last roughly 7 days from PR close. I'm proposing a way to customise this so that we can set a value for how long they persist. Options could include, 30 days, 3 months, a year, "Don't delete entities on PR close".

This could help aid dashboards that look at closed PR's as currently this data is lost.