[vitormattos]

Reconciles the remaining distinct test coverage from #8948 against current main after #8912 merged the production fix.

Preserved from André Maia's contribution:

• activateNextOrder() returns no activated signers for parallel flows and performs no sign-request lookup;
• every identify-method group of every activated signer is notified.

The production changes and the remaining rejection/notification tests from #8948 already have equivalent or stronger coverage in main through #8912. André Maia remains credited as co-author of this reconciliation commit.

Related: #8948, #8912

[vitormattos]

Closing this temporary follow-up. After a deeper review, #8948 has been reopened and will remain the place where André Maia's remaining work is reconciled against current main. Keeping this PR open would split that work across two pull requests.