fix(core): Ensure init before checking leader or follower in multi-main scenario (#7621)

This PR ensures `MultiMainInstancePublisher` is initialized before
checking if the instance is leader or follower. Followers skip license
init, license check, and pruning start and stop.

packages/cli/src/services/orchestration/main/MultiMainInstance.publisher.ee.ts

@@ -28,6 +28,8 @@ export class MultiMainInstancePublisher extends SingleMainInstancePublisher {
 	private leaderCheckInterval: NodeJS.Timer | undefined;
 
 	async init() {
+		if (this.initialized) return;
+
 		await this.initPublisher();
 
 		this.initialized = true;