pet.trezy.achievement

How a badge is earned. Published to the game's repo, one per achievement, alongside the `community.lexicon.badge.definition` it points at. The split is deliberate: the DEFINITION is the portable, standard artefact any client can read and render, and this is the game's private bookkeeping. Nothing here is needed to display a trophy — only to decide whether somebody has earned one — so it stays out of the interoperable record rather than bloating it with rules no other reader could evaluate anyway. The rkey is the achievement id.