docs: pin Authority Map remediation evidence

[FutureEnterprises]

Summary

• link the original five-finding remediation to emilia-protocol PR #539
• link a source-pinned Authority Map run reporting 52 workflows and zero critical findings
• make the non-exploit, non-mediation, and runtime-bypass boundaries explicit

Verification

• node --test tests/*.node-test.mjs: passed
• git diff --check: passed