Feat/537 add prometheus exporter support (#553)

* Feat: Prometheus exporter plugin
Ref: #537

---------

Co-authored-by: djklim87 <[email protected]>

Author: djklim87

composer.lock

@@ -113,6 +113,7 @@ public static function process(string $id, string $payload): Response {
 			$message = match ($outputFormat) {
 				// TODO: Maybe later we can use meta for time, but not now cuz no time for non select
 				OutputFormat::Table => $result->getTableFormatted($startTime),
+				OutputFormat::Plain => $result->toString(),
 				default => $result->getStruct(),
 			};
 			$response = Response::fromMessageAndMeta(

src/Network/EventHandler.php

@@ -50,6 +50,7 @@ public static function fromRequest(Request $request): static {
 	public static function hasMatch(Request $request): bool {
 		$payload = strtolower($request->payload);
 		if ($request->payload === ''
+			&& $request->endpointBundle !== Endpoint::Metrics
 			&& $request->endpointBundle !== Endpoint::Bulk
 			&& $request->endpointBundle !== Endpoint::Elastic) {
 			return true;