## Summary

<!-- What changes in this PR. One paragraph. Readable by an auditor
without ticket context. -->

## Scope

<!-- What this branch does. One branch = one scope. -->

-

## Non-scope

<!-- What this branch intentionally does NOT touch, even if related.
Prevents reviewers from asking. -->

-

## Tickets

- SAN-XXX

## Breaking changes

<!-- If this changes the schema, fingerprint formula, required fields, or
protocol version, describe impact and migration. Otherwise: "None." -->

## Cross-SDK / cross-repo impact

<!-- Does this require coordinated changes in sanna-repo, sanna-ts, or
sanna-cloud? Link sibling PRs or describe ordering. -->

## Test plan

- [ ]

## Governance notes

<!-- Sanna is trust infrastructure; the protocol IS the product. Spell
out what governance guarantee this PR affects — receipt integrity,
cross-SDK coherence, version semantics, audit trail. -->

## Verification output

<!-- Paste relevant output: test run summary, grep results, schema
validation, etc. -->
