docs(api-ref): molecule-audit-ledger — HMAC chain, /audit endpoint, CLI (PR #651)
Add Audit Ledger section to api-reference.mdx:
- GET /workspaces/:id/audit with all query params (agent_id, session_id,
from/to RFC 3339, limit cap 500, offset)
- Response shape including chain_valid tri-state (true/false/null)
- AUDIT_LEDGER_SALT callout (platform + workspace envs must match)
- LedgerHooks Python usage snippet for workspace templates
- molecule_audit.verify CLI exit codes
Pairs with monorepo PR #651 (feat: molecule-audit-ledger — EU AI Act
Art. 12/13 compliance, HMAC-SHA256-chained agent event log).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>