Record automatic currency account validation and delivery (#72)

docs/payments.md

@@ -87,7 +87,7 @@ and payout bindings remain separate from creation of the currency accounts.
 
 Deploy [Sendico #2968](https://git.sendico.io/tech/sendico/issues/2968) first:
 Ledger (including its unique index), then Product Edge, then SXCHNGE backend and
-frontend from [task #72](https://git.sendico.io/tech/sxchnge/issues/72). The public
+frontend from [PR #73](https://git.sendico.io/tech/sxchnge/pulls/73). The public
 ledger list must advertise `externalSubjectAccounts: true` before SXCHNGE sends
 any create requests. Older providers fail safely without creating accounts.
 The acknowledgement assumes Ledger and Edge are deployed in that order; it

docs/ux/exchange-workspace.md

@@ -334,11 +334,23 @@ balance card was viewed. Existing transaction journey outcomes below are reused;
 no speculative button-click events are added.
 
 Scope and rollout: [task #72](https://git.sendico.io/tech/sxchnge/issues/72), branch
-`wallet-72`, [task #72](https://git.sendico.io/tech/sxchnge/issues/72). The provider
+`wallet-72`, [PR #73](https://git.sendico.io/tech/sxchnge/pulls/73). The provider
 prerequisite and deployment order are documented in [payments](../payments.md).
 Merge and deployment remain separate. Final validation is recorded in the task
 and PR, including any transient failures and environmental blockers.
 
+Final validation (2026-10-23): `flutter gen-l10n`, `flutter analyze` in
+`frontend/app`, the changed-Dart formatting check, `make lint-backend`, and
+`git diff --check` passed. `make test-frontend` passed all 242 tests on the current
+app base, including the eight setup recovery scenarios. The full `make test`
+passed with `TESTCONTAINERS_RYUK_DISABLED=true GOFLAGS='-p=2'`: earlier attempts
+hit dependency DNS and Mongo/cleanup-helper startup timeouts. Disabling only the
+failing helper retained every integration assertion, test timeout and race check;
+each test's existing container cleanup still ran. No security scan was requested.
+The live local provider catalog confirms RUB scale 2 and USDT/USDC scale 6.
+Provider-side concurrency and frozen-binding checks passed against a disposable
+Mongo replica set; see [Sendico PR #2970](https://git.sendico.io/tech/sendico/pulls/2970).
+
 ## Journey measurement plan
 
 Reuse the typed analytics abstraction and maintain a separate journey per active