fix(core): gate coinbase owner refresh behind prague

Refreshing the coinbase owner during block execution changes fee-credit routing and therefore consensus state. Keep the historical block-level owner semantics before Prague and only re-read the current owner per transaction after Prague.

Add unit tests covering both TRC21 and native-fee paths for the pre-Prague and post-Prague behaviors.

Author: gzliudan

core/state_processor.go

@@ -458,6 +458,7 @@ func ApplyTransactionWithEVM(msg *Message, gp *GasPool, statedb *state.StateDB,
 	// End Bypass denylist address
 
 	// Apply the transaction to the current state (included in the env)
+	coinbaseOwner = statedb.GetOwner(evm.Context.Coinbase)
 	result, err := ApplyMessage(evm, msg, gp, coinbaseOwner)
 	if err != nil {
 		return nil, 0, false, err