mundane.api.card_schema

Vendored, pinned copy of the Mundane card-set JSON Schema (the validation contract).

This mirrors the meta repo (mundane) schemas/card-set.schema.json and tracks its schema-v1 tag. It is vendored — never fetched at runtime — so set validation never depends on the network or on unrelated changes to the schema’s main. Re-vendor this file when schema-v1 is bumped.