Sessions are account-scoped (per spec §7.9), not user-scoped, to support
team coverage. Comment-only fix surfaced by final review.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Mounts /api/v1/l1/* with require_l1_or_coverage on every route. Intake
creates an internal ticket and starts a flow OR adhoc session (PSA queue
merge follows in Phase 2). Step/notes/resolve/escalate delegate to
l1_session_service. escalate-without-walk creates an immediately-
escalated session for the BuildAbortedNoKB path.
ValueError from services → 400. Cross-account session access → 404.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
