fix: add safety timeout to session.compact() to prevent lane deadlock (#16533)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 21e4045add
Co-authored-by: BinHPdev <219093083+BinHPdev@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

src/agents/pi-embedded-runner/compaction-safety-timeout.ts

@@ -0,0 +1,10 @@
+import { withTimeout } from "../../node-host/with-timeout.js";
+
+export const EMBEDDED_COMPACTION_TIMEOUT_MS = 300_000;
+
+export async function compactWithSafetyTimeout<T>(
+  compact: () => Promise<T>,
+  timeoutMs: number = EMBEDDED_COMPACTION_TIMEOUT_MS,
+): Promise<T> {
+  return await withTimeout(() => compact(), timeoutMs, "Compaction");
+}