Port immediate RBF journey assertions to iOS #1816

The RBF journey in Android PR #1813 now opens the outgoing row immediately when Boost success appears, verifies replacement details before returning to the list, and forbids a settling delay. The iOS journey still checks the list first and then opens the row.

Source review: #1813 (comment)
Android source: https://github.com/synonymdev/bitkit-android/blob/d28d15c54200679d2abd3c38a8a8d04068a14d77/journeys/boost/rbf-own-send.xml
Counterpart: https://github.com/synonymdev/bitkit-ios/blob/master/journeys/boost/rbf-own-send.xml

Port the immediate-open assertion and the replacement-details/list-check ordering to synonymdev/bitkit-ios, retaining the shared journey name and action prose while adapting only platform identifiers and commands. If a verified platform limitation prevents the shared sequence, document that limitation in the journey description and cross-platform README instead.

Acceptance: compare the two journey sequences, record the iOS revision and execution outcome, and retain any unrun device gap explicitly. This is LOW documentation parity work; no iOS runtime defect is asserted. It is deferred from Android #1813 so that PR stays focused on native Android RBF correctness.