How the manifest labels a pass: its prefix and name, `SI - shape-interfaces`, or the bare name for a pass that owns no union.

Pass name -> the key prefix of the union that pass owns. Passes without a union never raise findings of their own and are absent.

The whole key table: `(key, union case name, tier)` for every case of every union.

Every finding union, in the order the manifest legend lists them. The snapshot test enumerates these; a union missing here has keys nothing guards.