fix(cli): fall back to compatible status endpoint

[Zhewen Tan (tandede)]

What changed

The CLI status command now preserves the richer /status response when that endpoint exists, but falls back to BrowserOS-compatible health endpoints when /status returns HTTP 404.

Only a missing endpoint triggers the fallback. Authentication and server failures such as HTTP 500 are still returned to the caller instead of being hidden.

Regression tests cover the primary /status path, the /system/health compatibility path, and non-404 failures.

Verification

• go test ./...
• go vet ./...
• go build ./...

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[Zhewen Tan (tandede)]

I have read the CLA Document and I hereby sign the CLA