Summary

When `anvil ci job-view ` succeeded at fetching metadata but then failed streaming logs, the bare `Error: API error (…)` line at the bottom made it look like the whole command had failed.

Before

``` CI Job 7a1731da43 Status passed Exit Code 0 …

Error: API error (406): server returned an HTML error page (expected JSON) ```

After

``` CI Job 7a1731da43 Status passed Exit Code 0 …

Could not fetch logs: API error (406): server returned an HTML error page (expected JSON) (Job metadata above was retrieved successfully.) ```

The 406 path itself was fixed by fangorn/anvil#131; this just polishes the framing for any future log-stream failure (5xx, network, etc.).

Test plan

• `cargo test` — 28/28 pass
• `cargo clippy –all-targets – -D warnings` clean
• `cargo fmt` clean
• Verified against prod (post-#131): job-view streams logs and exits 0

Closes #9