With commit a8895c99a7d0750132477d80cd66caaf3a709113 we introduced a framework to store more meta information in the trust packets. The background is that we want to track the origin of a key as well as a timestamp of its last refresh.
This needs to be implemented
| rG GnuPG | |||
| rG330212efb927 gpg: Pass key origin values to import functions. | |||
rG166d0d7a2439f30c0a250faadc16ce3453447d71 is a first take on this. It is not complete but should be sufficient for now.
AFAICS this is now implemented. We have the option --with-key-origin and even support in GPGME.