Fix vix health reporting healthy state after curl timeout

[GaspardKirira]

Problem

vix health can currently display Healthy: yes even when the HTTP check failed with a curl timeout.

This is confusing because the final status says the service is healthy while the actual request failed.

Example behavior:

Healthy: yes
curl: timeout

Expected behavior

If the HTTP request times out, the health command should clearly report the check as failed.

Expected output should be closer to:

Healthy: no
Error: curl timeout

or:

Status: failed
Reason: request timed out

What to fix

The health result should not be marked as healthy unless the response was successfully received and validated.

The logic should separate:

• service process status
• HTTP response status
• curl/network errors
• timeout errors
• response parsing errors

A timeout must always make the HTTP health check fail.

Goal

Make vix health local and vix health public reliable and avoid false positive health reports.