fix(cli): carry status/doctor live proxy onto dig2-go (#642)

[Wibias]

Summary

• Carries fix(cli): status/doctor use identity-verified live proxy #642 / e6169b0e onto dev2-go (TS oracle + tests).

Go port

Deferred: #678

Go already has FindLiveProxy / status callers; needs parity for read-only configFn, authoritative null PID, and listen source.

Test plan

• Cherry-pick clean

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve version and uptime in live health reports

When a proxy is running, this branch now bypasses checkProxyHealth and replaces its ok v<version>, uptime <seconds> result with only ok (pid ...). Consequently both the human-readable ocx status output and proxy.health.message in status --json lose existing diagnostic information on every successful live check. Preserve the version and uptime returned by the first identity probe—such as by carrying them through proxyIdentityAt/findLiveProxy—and add focused live-status coverage.

AGENTS.md reference: src/AGENTS.md:L24-L25

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[chatgpt-codex-connector]

Distinguish a live proxy whose PID is unavailable

When findLiveProxy discovers an orphaned legacy proxy, it intentionally returns a live result with pid: null; passing that null into collectRunningProxyEnv makes the doctor print no running ocx proxy process found, even though the following memory section and restart hints treat the proxy as running. In this scenario the process environment is merely unavailable because its PID is unknown, so pass the live-state information through and render an unavailable/unknown-PID diagnostic instead of not_running, with focused coverage for this live-null-PID path.

AGENTS.md reference: src/AGENTS.md:L24-L25

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