Name Tokens API: Refine "no tokens found" handling #1445
Description
It is wrong that no tokens found is a 404 error.
We must separate the following ideas:
- We never indexed the name tokens associated with the given name / domainId, and therefore we have no knowledge about them at all. This is a valid 404 error.
- We indexed the name tokens associated with the given name / domainId, but there were none. This is NOT a 404 error. It is a 200 response (OK) that should return an empty set of name tokens as no name tokens have ever been issued for the name.