v8.7.0 Mock Prism Central Harness

v8.7.0-mock-prism-central-harness

Summary

Adds a local mock Prism Central harness so the AHV lifecycle path can be tested end to end without a Nutanix lab.

Highlights

• Adds a standalone Node-based mock Prism Central server.
• Adds fixture data for clusters, projects, subnets, images, VMs, and tasks.
• Adds .env.mock-prism.example and docker-compose.mock-prism.yml for running NDC Studio with the mock Prism service.
• Adds mock Prism validation and lifecycle smoke scripts.
• Adds unit coverage for Basic Auth, read-only inventory, create, poll, power, destroy, inventory reconciliation, and safety-prefix enforcement.

Safety

• Real AHV lab mode remains disabled by default.
• The mock harness uses fixture and in-memory state only.
• Public/static demo behavior remains simulated.
• Real Prism Central credentials must not be placed in .env.mock-prism.