ProgramInput/ProgramOutput.self_program_id/caller_program_id, and the
dispatcher's CallerData.program_id, now carry AccountId (renamed to
self_account_id/caller_account_id) instead of ProgramId. These fields
are self-reported/cross-checked dispatch bookkeeping, not RISC0 image
identity, and AccountId already crosses the guest/host boundary this
way via every pre_state.account_id.
ProgramId is now confined to what's actually image-id-keyed:
env::verify, Program.id (from compute_image_id()), and the
for_public_pda/for_private_pda derivation formulas, each recovering
the real ProgramId from AccountId via the existing bijection exactly
where needed.
Rebuilds artifacts and the prebuilt sequencer db fixture to match.
Marvin Jones