Reusable Node Cluster Templates for Change Management Runbooks

Network Change runbooks currently require each node, such as Benchmark Before, Execute, Benchmark After, and Compare, to be added individually when building a multi-step change. This becomes repetitive when a runbook needs to represent multiple discrete changes in sequence. This enhancement would allow users to insert a predefined cluster of related node types as a single action, rather than adding each node one at a time. Customers building runbooks with multiple change segments would benefit from faster runbook construction and more consistent structure across change steps.