Shared Deck calendar not found for PROPPATCH if shared without edit rights

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Describe the bug

I have a bunch of Deck boards shared with me. Some are read-write, some are read-only. When I check the option to show Deck Calendars in the bottom left the boards show as calendars in Calendar. However, I can only toggle visibility for board calendars where I have edit rights.

To Reproduce
Steps to reproduce the behavior:

1. Share a calendar from user A to user B read-only
2. Open the Calendar app as user B
3. Toggle the calendar visibility
4. See an error

Expected behavior

Visibility changes

Screenshots

see above

Start by reproducing the read-only shared Deck calendar case in Calendar using the listed steps and compare it with an editable share. The payload names no source file or test; done means a read-only user can toggle visibility without the reported error.