Add Azure Health Models monitoring experience

Problem

Azure Health Models provide a topology-oriented view of current application health, but users must currently leave Grafana to inspect model inventory, entity health, and relationships.

Proposal

Add a read-only Azure Health Models experience to the Azure Cloud Native Monitoring app that:

• Discovers Health Models in a selected subscription.
• Loads the selected model's entities and relationships from the Microsoft.CloudHealth ARM API.
• Summarizes current entity health states and basic model information.
• Reuses the configured Azure Monitor datasource as authenticated ARM transport.

Initial scope

• One subscription and one selected model at a time.
• Current state only.
• Read-only GET requests.
• Bounded ARM pagination and explicit partial-result handling.

Model editing, signal configuration, history, and relationship graph visualization can be considered separately after the initial experience is validated.

Start by locating the Azure Cloud Native Monitoring app entry point and how the configured Azure Monitor datasource transports authenticated ARM requests. Review the Microsoft.CloudHealth ARM API flow for subscription and model discovery, entity and relationship loading, pagination, and partial results. Done means a read-only view for one subscription and selected model showing current entity health and basic model information.