Record identity verification delivery links

docs/implementation.md

@@ -895,8 +895,14 @@ private bounded uploads, stable retries, exact decimal policy projections and
 explicit upgrade-pending feedback are included. The unrelated notifications
 runtime configuration is excluded.
 
-The implementation requires Sendico #2885 and follows sign-up Facts PR #47.
-Validation and delivery links are recorded below after the final checks.
+Delivered in [PR #49](https://git.sendico.io/tech/sxchnge/pulls/49), branch
+`identity-verification-48`, implementation commit `1354551`. It is stacked on
+[sign-up Facts PR #47](https://git.sendico.io/tech/sxchnge/pulls/47), which must
+merge first, and requires
+[Sendico PR #2886](https://git.sendico.io/tech/sendico/pulls/2886) to be deployed
+before enabling the new flow. Tracking tasks:
+[SXCHNGE #48](https://git.sendico.io/tech/sxchnge/issues/48) and
+[Sendico #2885](https://git.sendico.io/tech/sendico/issues/2885).
 
 Completion review covered the full backend and frontend contribution, including
 subject ownership, private uploads, idempotent retries, session changes, exact