Remove "pre validation" by cross validation nodes

### Is your feature request related to a problem?

_No response_

### Describe the solution you'd like

Remove the prior worflow from cross validation node and use directly the entire validation nodes to validate the transaction.
Current validation nodes could be named "synchonization nodes"

### Additional context

_No response_

### Epic

_No response_

The issue names cross-validation nodes, validation nodes, and transaction validation but gives no files, tests, or entry points. Start by locating those workflows in the Elixir codebase and document how the current pre-validation path operates. Done should mean the prior workflow is removed, the full validation nodes validate transactions directly, and any requested naming change is addressed.

Written by the indexing model from the issue text.