feat(FN-4332): complete Step 1 — add failure notification settings defaults

Fusion-Task-Id: FN-4332
Fusion-Task-Lineage: c920ac71-906b-458d-b496-1b60540b58f3

packages/core/src/__tests__/notification-dispatcher.test.ts

@@ -160,5 +160,7 @@ describe("NotificationDispatcher", () => {
       "memory-dreams-processed",
     ]);
     expect(DEFAULT_GLOBAL_SETTINGS.notificationProviders).toEqual([]);
+    expect(DEFAULT_GLOBAL_SETTINGS.failureNotificationDelayMs).toBe(30000);
+    expect(DEFAULT_GLOBAL_SETTINGS.failureNotificationMode).toBe("sticky-only");
   });
 });

packages/core/src/settings-schema.ts

@@ -39,6 +39,8 @@ export const DEFAULT_GLOBAL_SETTINGS = {
     "memory-dreams-processed",
   ],
   ntfyDashboardHost: undefined,
+  failureNotificationDelayMs: 30000,
+  failureNotificationMode: "sticky-only",
   webhookEnabled: false,
   webhookUrl: undefined,
   webhookFormat: "generic",

packages/core/src/types.ts

@@ -1685,6 +1685,13 @@ export interface GlobalSettings {
    *  ?project=<id>&task=<id> so the dashboard opens the correct project first.
    *  Example: "http://localhost:3000" or "https://fusion.example.com" */
   ntfyDashboardHost?: string;
+  /** How long a task must remain in `status='failed'` before a push notification fires.
+   *  Set to 0 to dispatch immediately (legacy behavior). Default: 30000 ms. */
+  failureNotificationDelayMs?: number;
+  /** `sticky-only` (default) defers failure notifications by `failureNotificationDelayMs`
+   *  and suppresses them if the task self-recovers. `all` restores the legacy
+   *  immediate-dispatch behavior. */
+  failureNotificationMode?: "sticky-only" | "all";
   /** When true, enables webhook notifications for task lifecycle events.
    *  Requires webhookUrl to be set. Default: false. */
   webhookEnabled?: boolean;