fix(FN-1284): move terminal execution failures to in-review

- Move single-session and step-session executor failure paths to in-review after marking tasks failed
- Route exhausted transient recovery retries to in-review instead of leaving tasks outside review flow
- Move stuck-kill budget exhaustion failures in self-healing to in-review and update failure log wording
- Add regression tests in executor and self-healing suites to verify in-review transitions on these failure states

packages/engine/src/self-healing.ts

@@ -213,9 +213,10 @@ export class SelfHealingManager {
           status: "failed",
           error: `Task stuck ${newCount} times — exceeded maximum of ${maxKills} stuck kills`,
         });
+        await this.store.moveTask(taskId, "in-review");
         await this.store.logEntry(
           taskId,
-          `Permanently failed: agent stuck ${newCount} times (max: ${maxKills})`,
+          `Permanently failed: agent stuck ${newCount} times (max: ${maxKills}) — moved to in-review`,
         );
         return false;
       }