Go-live T05 + WP-0013/0014: first Phase and Control Plane completion

Accept WP-0008-T05 for trsl:phase:info-tech-canon-service-surface
(history/260805-T05-GoLive-info-tech-canon.md). Finish WP-0013 remission
automation and WP-0014 extension/breach/attestation Control Plane UI.
Update SCOPE, README, and pilot-candidate notes for pilot Stage 1.

specs/policies/linear-longstop-v0.md

@@ -26,10 +26,19 @@ cohort, not merely a Stage 0 pilot placeholder.
 
 ## Status
 
-Not yet automated — see
-`workplans/TREV-WP-0013-remission-credit-automation.md`. Nothing in this
-codebase currently computes or writes these entries; this file is the
-formula those entries must be checkable against once that workplan lands.
+Automated as of WP-0013 (`src/target_revenue/remission.py`):
+
+- Pure cumulative formula: `cumulative_remission(T0, t0, tL, as_of)`.
+- Hosted apply writes the delta
+  `max(0, R(as_of) − Σ policy remission-credit already on the ledger)`.
+- **t0** = Trust Service `phase_manifests.registered_at` (no separate
+  `activated_at` manifest field in Stage 0).
+- **Cadence**: monthly UTC (1st 00:00) for scheduled batch
+  (`POST /remission/run`); on-demand via
+  `POST /phases/{id}/remission` or Control Plane "Apply policy remission now".
+- **Actor**: Licensor credential labeled `system:policy-engine`
+  (not a human token).
+- Re-runs at the same `as_of` are no-ops (idempotent by cumulative delta).
 
 ## Superseded / next iteration