Increase duration of calendar subscription

[dctalbot]

What problem would you like to solve? Please describe:
Currently, the calendar subscriptions only go out for ~30 days. I'm on call every 8 weeks and can't see when my next shift is until I enter that 30 day threshold.

Describe the solution you'd like:
Increase calendar subscriptions from 1 month to 6 or 12 months ideally

Describe alternatives you've considered:
Check GoAlert application directly, but this is inconvenient

[stale]

This issue has been automatically marked as stale because it has not had recent activity.

[m17ch]

Team discussed:
1.) Want to look at internal logs to determine how often endpoints are used
2.) Functionally validate load / impact on app & db while testing new limit (12 mo) and worst-case scenarios
3.) Could leverage in-memory limiter, if needed