Perhaps in a decade we can efficiently do this with an ILLM (insanely large language model) with eidetic memory, trained on the web and all our other media.

Store the model in an elaborately constructed polygonish gold-etched glowy ball that fits in the palm of a hand, complete with a plutonium thermal energy core, carbon fiber audio sensor and speakers, and then hide it somewhere - but leave clues.

I know we are not supposed to post Chat Gen stuff here, but I couldn't resist getting some help with the critical part, naming the artifact:

Omniscube of Existential Continuity

TerraQuorium, a Human Codex

PlutoniLex, Oracle of Mankind

The Nexus Cube of Cosmic Archives

Anthrokora Galactica Rosetta

Helixicon Pinnacle of Human Intellect

Quintessence Eternal Brain

MetaMnemnon, The Earth Archive

Solon's Cubic Echomancer

Tempuscrate's Timeless Witness

Apotheotic MindStone

Pandora's Polyhedron: Repository of Reality

Aside from the names, I think placing devices like this on various solar system bodies would be an effective and convenient back up for aliens to interact with.

Just a couple years ago this would have sounded fantastical and impractical. Today it would be sensible.