audit-log-design.md updates for signatures #103
Description
At the end of audit-log-design.md, a paragraph explains how identifiers, preferences and seed signatures can be verified.
For consistency and to limitate duplication, I think it should:
- reference signatures.md for main logic
- use "signature input" wording
- references the new documents available in /model for details on what the signature input contains
@RomainLofaso, WDYT?