consensus: add debug event on wrong version check

Adding this check reveals that the WrongVersion errors aren't coming
from the correct WrongVersion check.

zebra-consensus/src/transaction.rs

@@ -93,6 +93,7 @@ where
             tracing::trace!(?tx);
             match &*tx {
                 Transaction::V1 { .. } | Transaction::V2 { .. } | Transaction::V3 { .. } => {
+                    tracing::debug!(?tx, "got transaction with wrong version");
                     Err(TransactionError::WrongVersion)
                 }
                 Transaction::V4 {