Bug/68916 changing the schedule of a recurring meeting leads to multiple entries in the ical export for past dates

[klaustopher]

Ticket

https://community.openproject.org/projects/meetings-stream/work_packages/68916

What are you trying to accomplish?

• Correctly handle rescheduled recurring meetings

Screenshots

What approach did you choose and why?

Merge checklist

• [ ] Added/updated tests
• [ ] Added/updated documentation in Lookbook (patterns, previews, etc)
• [ ] Tested major browsers (Chrome, Firefox, Edge, ...)

[klaustopher]

~~I will need to validate this with a calendar app. But maybe review can already be started on the code.~~

Validated in iCal and does what I'd expect.