Pubkey hash not correctly loaded for invalidating nanopubs in type-specific repos

[tkuhn]

Invalidating nanopubs are loaded also into the repos of the types of the nanopub they invalidate. It seems, however, that the npa:hasValidSignatureForPublicKeyHash info is not correctly loaded in this case.

See https://query.petapico.org/tools/type/3ef5b11551ebc44e34f4bca614b387204447656ce195314532769ca7b20143fe/yasgui.html#query=prefix+npa%3A+%3Chttp%3A%2F%2Fpurl.org%2Fnanopub%2Fadmin%2F%3E%0A%0Aselect+*+where+%7B%0A+graph+npa%3Agraph+%7B%0A+++%3Chttp%3A%2F%2Fpurl.org%2Fnp%2FRAQ0Epi1in-NYRSKkA34zxZG53yT8vFlijk_lLIQGSnRg%3E+npa%3AhasValidSignatureForPublicKeyHash+%3Fpubkey+.%0A+%7D%0A%7D+limit+10&contentTypeConstruct=text%2Fturtle&contentTypeSelect=application%2Fsparql-results%2Bjson&endpoint=%2Frepo%2Ftype%2F3ef5b11551ebc44e34f4bca614b387204447656ce195314532769ca7b20143fe&requestMethod=POST&tabTitle=Query&headers=%7B%7D&outputFormat=table