Firmantia demo evidence pack

pack.json is a real evidence pack made from synthetic data: an invented Microsoft Agent 365 audit
export (made-up agents, users and threads), sealed on 2026-10-05 with a demo signing key and time
stamped by DigiCert's public RFC 3161 authority. No customer data; nothing in it is real except the
time stamp.

To check it: open verify.html (from firmantia.dev/demo/verify.html, or saved to your computer),
switch your network off if you like, and drop pack.json on it. It should say VERIFIED. Change any
character inside one record's "body" and drop it again: it says FAILED and names the record.
