libSceVnaWebsocket technical debt

Additional callable exports - 22 entries present in both version-labelled images are import-resolution declarations only. None is listed in the pinned public 3.20 catalogue for this library. Neither label independently authenticates retail firmware provenance. Parameter lists, return types and behavior are unverified; parameterless int declarations are placeholders, not verified ABI contracts. Every entry throws through NotImplemented_nid_no_patch. Unknown names use literal NID aliases. One data export is outside this callable inventory and requires separate layout and ownership analysis. Identified candidate names match their NIDs in the public symbol database or supplemental catalog.