Custom types don't match for elfeed elfeed-summary-settings

[Thaodan]

Hey,

While switching from setq to setopt I noticed that the types mentioned
in defcustom don't match their contents or are not defined at all.

The warning:

 Warning (emacs): Value ‘<value cut out>‘for variable ‘elfeed-summary-settings’ does not match its type "elfeed-summary-setting-elements"

For reference here are my settings:
https://github.com/Thaodan/emacs.d?tab=readme-ov-file#elfeed