Proactive Alerts for Missing Data Required by Playground Features

NetBrain does not currently notify users when a feature, such as Layer 2 topology calculation, cannot function correctly because required underlying data has not been provided. This can leave users uncertain why a capability failed or produced incomplete results. This enhancement would introduce contextual system messaging that detects missing prerequisite data for a given feature and alerts the user before or during the attempted action, with guidance on what information is needed. Customers would gain clearer understanding of feature dependencies, reducing confusion and support inquiries related to unexplained functional gaps.