`step_session` compares a row found by command id against the fresh session
with `same_answer`. The command id is `session_command_id(world_id,
jurisdiction, answer_digest)`, so a row under the fresh session's id carries
the fresh session's digest unless its bytes were forged or the hash collided;
the digest clause never decided and survived as an equivalent mutant in two
Soul passes. It is deleted; world, jurisdiction and answer remain.
The id derivation is unchanged, and
`soul_the_session_command_id_derivation_moved_under_the_refactor` still pins
that a moved digest moves the id. Suite counts are unchanged and the distinct
warning messages equal those at 01312dd.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
872ba3525c