feat(FN-980): add mission autopilot for autonomous slice progression

- Add MissionAutopilot class with state machine (inactive → watching → activating → completing)
- Add autopilot database schema: autopilotEnabled, autopilotState, lastAutopilotActivityAt columns
- Integrate autopilot with scheduler: handleTaskCompletion() triggers slice activation
- Add API routes: GET/PATCH /missions/:id/autopilot, POST start/stop endpoints
- Add autopilot toggle UI in MissionManager dashboard component
- Add retry logic with exponential backoff (up to 3 attempts) for slice activation
- Add background poll (60s) to detect stale autopilot missions
- Include changeset for @gsxdsm/fusion minor bump

packages/dashboard/src/server.ts

@@ -40,6 +40,16 @@ export interface ServerOptions {
   automationStore?: AutomationStore;
   /** Optional AiSessionStore — if not provided, one is created from the default store's database */
   aiSessionStore?: AiSessionStore;
+  /** Optional MissionAutopilot for autonomous mission progression */
+  missionAutopilot?: {
+    watchMission(missionId: string): void;
+    unwatchMission(missionId: string): void;
+    isWatching(missionId: string): boolean;
+    getAutopilotStatus(missionId: string): import("@fusion/core").AutopilotStatus;
+    checkAndStartMission(missionId: string): Promise<void>;
+    start(): void;
+    stop(): void;
+  };
 }
 
 type DashboardExpressApp = ReturnType<typeof express> & {