[feature] Optimized nodes to join Xenon's logic and the cluster status.

[runkecheng]

Is your feature request related to a problem? Please describe.

All nodes will be joined to Xenon after each pod is ready.

Describe the solution you'd like

• make a synchronization every time a POD is created.
• set the cluster as ready after leader-follower is correctly set.

Describe alternatives you've considered

Additional context