fix(FN-4201): add autosize regression coverage and finalize gates

Fusion-Task-Id: FN-4201
Fusion-Task-Lineage: 6bfc2e72-8c11-4e63-b3c7-9245965d2380

packages/core/src/store.ts

@@ -3081,6 +3081,7 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
     const activeTasks = await Promise.all((rows as unknown as TaskRow[]).map(async (row) => {
       const task = this.rowToTask(row);
       task.inReviewStall = getInReviewStallReason(task, { now });
+      task.stalledReview = detectStalledReview(task, { now });
 
       // Slim path: aggregate the timed-execution total server-side, then
       // strip the heavy log payload from the wire response. Without this

packages/core/src/types.ts

@@ -1,6 +1,5 @@
-import type { StalledReviewSignal } from "./stalled-review-detector.js";
-
 import type { InReviewStallSignal } from "./in-review-stall.js";
+import type { StalledReviewSignal } from "./stalled-review-detector.js";
 
 /** Valid thinking effort levels for AI agent sessions, controlling the cost/quality tradeoff of reasoning. */
 export const THINKING_LEVELS = ["off", "minimal", "low", "medium", "high"] as const;
@@ -1202,6 +1201,8 @@ export interface Task {
   /** Server-computed in-review stall signal. Undefined when no stall rule matches.
    *  Diagnostic-only: must not be used as an auto-completion signal. */
   inReviewStall?: InReviewStallSignal;
+  /** Heuristic stalled-review diagnostic signal (legacy compatibility contract). */
+  stalledReview?: StalledReviewSignal;
   /** Durable aggregate token usage totals for the task. Undefined when no usage has been recorded yet. */
   tokenUsage?: TaskTokenUsage;
   size?: "S" | "M" | "L";