test(FN-4410): complete Step 4 — cross-task escalation coverage

Fusion-Task-Id: FN-4410
Fusion-Task-Lineage: 306d4fe0-d024-49dd-86b4-fb98d4ceff59

packages/engine/src/__tests__/self-healing.test.ts

@@ -5751,6 +5751,26 @@ describe("SelfHealingManager reclaimSelfOwnedBranchConflicts", () => {
     expect(store.listTasks).toHaveBeenNthCalledWith(2, { column: "in-progress", slim: true });
   });
 
+  it("escalates live-foreign conflicts to in-review failed", async () => {
+    (store.listTasks as any)
+      .mockResolvedValueOnce([{ id: "FN-503", checkedOutBy: null, branch: "fusion/fn-503", worktree: "/tmp/fn-503" }])
+      .mockResolvedValueOnce([]);
+    vi.spyOn(branchConflictModule, "inspectBranchConflict").mockResolvedValueOnce({
+      kind: "live-foreign",
+      livePath: "/tmp/fn-503",
+      error: new Error("foreign branch owner"),
+    } as any);
+
+    const recovered = await manager.reclaimSelfOwnedBranchConflicts();
+    expect(recovered).toBe(0);
+    expect(store.updateTask).toHaveBeenCalledWith("FN-503", expect.objectContaining({
+      status: "failed",
+      paused: true,
+      pausedReason: "branch-conflict-unrecoverable",
+    }));
+    expect(store.moveTask).toHaveBeenCalledWith("FN-503", "in-review");
+  });
+
   it("escalates unrecoverable reclaim failures to in-review failed", async () => {
     (store.listTasks as any)
       .mockResolvedValueOnce([{ id: "FN-502", checkedOutBy: null, branch: "fusion/fn-502", worktree: "/tmp/fn-502" }])

packages/engine/src/self-healing.ts

@@ -1347,7 +1347,13 @@ export class SelfHealingManager {
             startPoint: task.baseCommitSha ?? task.mergeDetails?.mergeTargetBranch ?? "main",
           });
 
-          if (inspection.kind !== "reclaimable" || inspection.taskAttributedCommitCount <= 0) {
+          if (inspection.kind === "stale" || inspection.kind === "stale-resolved") {
+            continue;
+          }
+          if (inspection.kind === "live-foreign") {
+            throw inspection.error;
+          }
+          if (inspection.taskAttributedCommitCount <= 0) {
             continue;
           }