feat: add parent hash in the block event

[clarkchen]

What does this PR do?
Adds parent hash information to BlockLogTrigger to include this data in the block streaming output.

Why are these changes required?
This enhancement helps users easily identify forked blockchain scenarios by providing the parent hash information in the block logs, which is crucial for blockchain analysis and troubleshooting.

This PR has been tested by:

• Manual Testing

Follow up
NO

Extra details
The implementation adds a parentHash field to BlockLogTrigger and populates it in BlockLogTriggerCapsule by retrieving the parent hash from the block data.

[waynercheung]

Hi @clarkchen , the block event is used in the eventplugin.

So, do you want to check the parent hash when you fetch the block info from the event service, such as kafka and mongoDB?

[clarkchen]

@waynercheung good point.

I have checked the the code, the new parent hash will also be compatible with the event plugin, because java_tron passes objects to the plugin in string format.

EventPluginLoader.java

• parent hash will be appened to the return toJsonString(trigger)

java-tron/framework/src/main/java/org/tron/common/logsfilter/EventPluginLoader.java

Lines 464 to 472 in 2cc57bd

	public void postBlockTrigger(BlockLogTrigger trigger) {
	if (useNativeQueue) {
	NativeMessageQueue.getInstance()
	.publishTrigger(toJsonString(trigger), trigger.getTriggerName());
	} else {
	eventListeners.forEach(listener ->
	listener.handleBlockEvent(toJsonString(trigger)));
	}
	}

Plugins

the Plugin Interface, e.g. KafkaEventListener.java, MongodbEventListener.java, will handle string smoothly and push to clients new message, which format is "[oldmsg], parentHash: xxxxxx"

https://github.com/tronprotocol/event-plugin/blob/97bea8cc200ee2a1b6abf61860b33782794fb192/plugins/kafkaplugin/src/main/java/org/tron/eventplugin/KafkaEventListener.java#L40-L45