fix(execute): stop wrapping waitForJobCompletion in completionWithGrace

The 30s completionWithGrace was originally a "wait a bit for the job to
settle after tail returns" — sequential. When 0.2.0 moved tail and
completion into Promise.allSettled to give tail a stop signal, the grace
wrapper was kept around the parallel completion poll. That turned the 30s
grace into a hard ceiling on the entire run: completionGraced resolves
with {timedOut: true} after 30s regardless of how the actual job is doing,
which feeds back into jobTimedOut and surfaces to the user as
"Timed out after 0s" when timeoutSec is 0 (no configured timeout).

Drop the wrapper. Use the bare completionPromise. The tail loop already
has a clean stop path via stopSignal.stopped which is set when the real
job completion resolves; no separate grace timer is needed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/server/execute.ts

@@ -470,12 +470,14 @@ async function streamAndAwaitJob(
     // Run the file tail and the job-completion poll in parallel so that the
     // tail loop has a way to stop: when waitForJobCompletion resolves it sets
     // stopSignal.stopped, which lets tailPodLogFile drain and return.
+    // No completionWithGrace wrapper here — wrapping a long-running job poll
+    // in a 30s grace turns the grace into a hard ceiling and kills runs
+    // prematurely with "Timed out after 0s" when timeoutSec is 0 (no timeout).
     const completionPromise = waitForJobCompletion(namespace, jobName, completionTimeoutMs, kubeconfigPath)
       .then((r) => { stopSignal.stopped = true; return r; });
-    const completionGraced = completionWithGrace(completionPromise, LOG_EXIT_COMPLETION_GRACE_MS);
     const [tailSettled, completionSettled] = await Promise.allSettled([
       tailPodLogFile(podLogPath, { onLog: wrappedOnLog, stopSignal }),
-      completionGraced,
+      completionPromise,
     ]);
     stdout = tailSettled.status === "fulfilled" ? tailSettled.value : "";
     if (completionSettled.status === "rejected") {