Just answering your original question - Core data is not the right choice for this at all.
ABeeThatsBusy
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It's now been several hours (around 4 hours from the time I started counting) and the status page still shows that everything's okay. Yet, everything is NOT okay. We've been unable to process and submit our builds to App Store / Testflight.
This, my friend, is why there's an ongoing multi-million dollar litigation with Epic vs Apple. No you cannot.
What's annoying is that https://developer.apple.com/system-status/ does not acknowledge it. It's misleading and confusing as I've reset our wifi / network connection dozens of times thinking it must be me.
I've submitted a proposal here: https://developer.apple.com/forums/thread/705799#705799021
If I try and add release notes or change logs or anything else, I see An error has occurred. Try again later.
I can build and submit but cannot do anything within app store connect, keep seeing Sorry, something went wrong. Try your request again. If the problem continues contact us
Same here - seeing "Sorry, something went wrong. Try your request again. If the problem continues"
Failing for me - the .ipa won't generate