Ignore $select suggestion for $value endpoint on /photo

[jimmywim]

The output can be a bit polluted with suggestions to use $select where it's irrelevant, for example, the User Photo endpoint $value which returns binary data, $select is irrelevant here.

[waldekmastykarz]

Correct. We're looking for a more robust way to suggest the use of $select where it's truly applicable, rather than what we've got available now. As a workaround, we could disable it explicitly on $value endpoints. Any other use cases that we should consider for the temporary workaround?

[waldekmastykarz]

Related to #107

[jimmywim]

Thanks Waldek - no other endpoints immediately spring to mind, but I'll note it in here if I come across any!