Sentry-Java has an option cachDirSize for the number of maximum envelopes to store on disk. In Cocoa, this is hardcoded to 100 in the SentryFileManager. Add MaxCacheItems to SentryOptions use it in the SentryFileManager and remove the hardcoded value there. Set the default to 100 and change it to 30 in 7.x.x.

Update the docs when this issue is closed: getsentry/sentry-docs#2879