Document reconciled Sendico review dependencies

docs/implementation.md

@@ -918,3 +918,12 @@ checks. An initial parallel run hit the existing Testcontainers reaper deadline;
 serial Go package execution resolved local Docker contention without weakening
 checks. No optional security scan, live customer proof, email, production
 approval, deployment or merge was performed. Generated outputs remain ignored.
+
+Reconciliation follow-up: the shared Limits assignment implementation and its
+persisted-state validation are owned by Sendico PR #2886. The subsequent
+[Sendico Facts review PR #2887](https://git.sendico.io/tech/sendico/pulls/2887)
+retains both Product providers, Backoffice services and KYC destinations, and
+routes proof cases to Identity proof review while blocking generic login linking
+and assignment. Apply #2886 before #2887 and deploy the combined Sendico result
+before this SXCHNGE flow. The public proof/limits contract is unchanged; this
+SXCHNGE follow-up changes documentation only and requires consistency/diff checks.