feat(FN-5052): complete Step 8 — documentation and delivery

Fusion-Task-Id: FN-5052
Fusion-Task-Lineage: 607cd9e6-e4d0-4572-b183-8253d127209f

packages/engine/src/self-healing.ts

@@ -3943,6 +3943,9 @@ export class SelfHealingManager {
    * each kick refreshes `updatedAt`, so a task that re-enters review and gets
    * stuck again can only be kicked once per `taskStuckTimeoutMs` window.
    *
+   * When `settings.autoMerge === false`, this sweep is a no-op because those
+   * projects intentionally use PR-based/manual in-review ownership.
+   *
    * @returns Number of tasks kicked back to todo
    */
   async surfaceInReviewStalls(): Promise<number> {