What is the best way to add historical data to a new Upptime install?

[TinkerTechLab-TinkerMan]

Hello!

Due to updates to the terms of service, I am moving away from Uptime Robot and decided to try out Upptime as I have used it in the past and really enjoyed it.

However, because I have been using Uptime Robot for almost a year and a half, I would really love to keep the overall uptime intact after migration.

For example, the monitor "Monitor1" has an overall uptime ratio of 99.89% and has been running for 1 year, 3 months, and 2 days on UR. After creating it in Upptime, it has a 100% uptime running for 1 minute. What would be the best way to add the old average and timing into Upptime so it can calculate the new averages correctly?

My guess is that I need to update both /history/summary.json and /history/Monitor1.json, but since I have quite a lot of monitors I would like to know exactly what needs to be edited and what does not so I don't have to spend multiple days on this migration.

Thank you for any assistance you can offer!