fix: distinguish configured and live runtime identity

[ShuhaoZhangTony]

What changed

• distinguish deployment/receipt identity from a verified live serving endpoint
• prevent configured models from being reported as the model that served a response
• label Support evidence and health fields with explicit availability
• extend operational acceptance and regression coverage for live, receipt, timeout, and unknown states

Why

When the inference engine is inactive, deployment receipts still describe the intended model and NPU topology. The application incorrectly presented those facts as live runtime state.

Validation

• ruff check
• focused runtime/receipt/operational tests: 80 passed
• full suite: 728 passed, 28 skipped

Closes #27