feat(FN-5528): add soft-delete exclusion to stale blocked-by recovery scrip

Adds `deletedAt` sweep guards to the engine's self-healing and merger to prevent recovery operations from processing soft-deleted tasks, filters deleted tasks in the `recover-stale-blocked-by` script, includes a new regression test for the deadlock-scan exclusion pattern, and updates the soft-delete

Fusion-Task-Id: FN-5528

Fusion-Task-Lineage: 5c9e45ca-49a8-47a0-a23d-6fe8e15e7e00

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>
Fusion-Task-Id: FN-5528

packages/engine/src/__tests__/reliability-interactions/soft-delete-deadlock-scan-exclusion.test.ts

@@ -0,0 +1,162 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import { SelfHealingManager } from "../../self-healing.js";
+
+type TestTask = any;
+
+function makeTask(overrides: Record<string, unknown>): TestTask {
+  return {
+    id: "FN-X",
+    title: "task",
+    description: "",
+    column: "todo",
+    status: null,
+    mergeRetries: 0,
+    paused: false,
+    worktree: null,
+    blockedBy: null,
+    dependencies: [],
+    log: [],
+    steps: [],
+    updatedAt: "2026-05-22T00:00:00.000Z",
+    createdAt: "2026-05-22T00:00:00.000Z",
+    ...overrides,
+  };
+}
+
+function createStore(tasks: TestTask[], leakDeleted = false) {
+  const taskMap = new Map(tasks.map((task) => [task.id, { ...task }]));
+  const store = {
+    getSettings: vi.fn().mockResolvedValue({
+      globalPause: false,
+      enginePaused: false,
+      autoMerge: true,
+      taskStuckTimeoutMs: 60_000,
+      inReviewStalledThresholdMs: 60_000,
+      stalePausedReviewThresholdMs: 60_000,
+      engineActiveSinceMs: null,
+      engineActivationGraceMs: 0,
+      inReviewStallDeadlockThreshold: 3,
+    }),
+    listTasks: vi.fn(async (options?: { column?: string; includeDeleted?: boolean }) => {
+      return [...taskMap.values()]
+        .filter((task) => (options?.column ? task.column === options.column : true))
+        .filter((task) => (options?.includeDeleted || leakDeleted ? true : !task.deletedAt))
+        .map((task) => ({ ...task }));
+    }),
+    getTask: vi.fn(async (id: string, options?: { includeDeleted?: boolean }) => {
+      const task = taskMap.get(id);
+      if (!task) throw new Error("not found");
+      if (!options?.includeDeleted && task.deletedAt) throw new Error("not found");
+      return { ...task };
+    }),
+    updateTask: vi.fn(async () => ({})),
+    moveTask: vi.fn(async () => ({})),
+    logEntry: vi.fn(async () => ({})),
+    recordRunAuditEvent: vi.fn(async () => ({})),
+  };
+  return store as any;
+}
+
+describe("reliability interactions: FN-5528 soft-delete deadlock scan exclusion", () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2026-05-22T02:00:00.000Z"));
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("ignores soft-deleted in-review deadlock candidates when listTasks excludes deleted rows", async () => {
+    const deleted = makeTask({
+      id: "FN-DELETED",
+      column: "in-review",
+      status: "failed",
+      mergeRetries: 3,
+      paused: false,
+      worktree: "/tmp/wt-deleted",
+      deletedAt: "2026-05-20T05:50:51.015Z",
+    });
+    const dependent = makeTask({ id: "FN-DEP", column: "todo", blockedBy: "FN-DELETED" });
+    const store = createStore([deleted, dependent], false);
+    const manager = new SelfHealingManager(store, { rootDir: "/tmp/repo" });
+
+    expect(await manager.recoverStuckMergeDeadlocks()).toBe(0);
+    expect(await manager.recoverMergedReviewTasks()).toBe(0);
+    expect(await manager.surfaceInReviewStalls()).toBe(0);
+    expect(await manager.surfaceInReviewStalled()).toBe(0);
+    expect(await manager.surfaceStalePausedReviews()).toBe(0);
+
+    expect(store.updateTask).not.toHaveBeenCalledWith("FN-DELETED", expect.anything());
+    expect(store.moveTask).not.toHaveBeenCalledWith("FN-DELETED", expect.anything(), expect.anything());
+    expect(store.logEntry).not.toHaveBeenCalledWith("FN-DELETED", expect.anything(), expect.anything());
+    expect(store.recordRunAuditEvent).not.toHaveBeenCalled();
+  });
+
+  it("defensive guards skip leaked soft-deleted in-review rows", async () => {
+    const deleted = makeTask({
+      id: "FN-DELETED",
+      column: "in-review",
+      status: "failed",
+      mergeRetries: 3,
+      paused: false,
+      worktree: "/tmp/wt-deleted",
+      deletedAt: "2026-05-20T05:50:51.015Z",
+    });
+    const store = createStore([deleted], true);
+    const manager = new SelfHealingManager(store, { rootDir: "/tmp/repo" });
+
+    expect(await manager.recoverStuckMergeDeadlocks()).toBe(0);
+    expect(await manager.recoverMergedReviewTasks()).toBe(0);
+    expect(await manager.surfaceInReviewStalls()).toBe(0);
+    expect(await manager.surfaceInReviewStalled()).toBe(0);
+    expect(await manager.surfaceStalePausedReviews()).toBe(0);
+
+    expect(store.updateTask).not.toHaveBeenCalled();
+    expect(store.moveTask).not.toHaveBeenCalled();
+    expect(store.logEntry).not.toHaveBeenCalled();
+  });
+
+  it("still evaluates active stuck-merge tasks without deletedAt", async () => {
+    const live = makeTask({
+      id: "FN-LIVE",
+      column: "in-review",
+      status: "failed",
+      mergeRetries: 3,
+      paused: false,
+      worktree: "/tmp/wt-live",
+      updatedAt: "2026-05-21T00:00:00.000Z",
+    });
+    const store = createStore([live], false);
+    const manager = new SelfHealingManager(store, { rootDir: "/tmp/repo" });
+    const landedSpy = vi.spyOn(manager as any, "findLandedTaskCommit").mockResolvedValue(null);
+    vi.spyOn(manager as any, "evaluateBackwardMoveTripleProof").mockResolvedValue({ ok: false });
+
+    await manager.recoverStuckMergeDeadlocks();
+
+    expect(landedSpy).toHaveBeenCalled();
+  });
+
+  it("preserves clearStaleBlockedBy soft-deleted-blocker branch", async () => {
+    const deleted = makeTask({
+      id: "FN-DELETED",
+      column: "archived",
+      status: "failed",
+      mergeRetries: 3,
+      deletedAt: "2026-05-20T05:50:51.015Z",
+    });
+    const dependent = makeTask({ id: "FN-DEP", column: "todo", blockedBy: "FN-DELETED" });
+    const store = createStore([deleted, dependent], false);
+    const manager = new SelfHealingManager(store, { rootDir: "/tmp/repo" });
+
+    const repaired = await manager.clearStaleBlockedBy();
+
+    expect(repaired).toBe(1);
+    expect(store.updateTask).toHaveBeenCalledWith("FN-DEP", expect.objectContaining({ blockedBy: null }));
+    expect(store.logEntry).toHaveBeenCalledWith(
+      "FN-DEP",
+      expect.stringContaining("soft-deleted-blocker"),
+    );
+  });
+});