enhance booking and contract notification systems

- Added detailed logging for socket connection events in useBookingWindowSocket.
- Introduced new notification types for contract status and schedule updates.
- Updated notification visuals to include new icons for contract status.
- Enhanced notification href resolution for contract status and schedule updates.
- Implemented booking lifecycle notifier service for customer and staff notifications.
- Created contract notifier service for managing contract lifecycle notifications.
- Added end-to-end tests for booking window socket functionality.

apps/edr-freight-web/backoffice/src/features/bookingWindows/useBookingWindowSocket.ts

@@ -35,6 +35,18 @@ export function useBookingWindowSocket(enabled: boolean = true) {
       withCredentials: true,
     });
 
+    // Deliberate console breadcrumbs: "live updates not arriving" is only
+    // diagnosable from the browser when connect/reject outcomes are visible.
+    socket.on("connect", () =>
+      console.debug("[booking-windows] socket connected", socket.id),
+    );
+    socket.on("connect_error", (err) =>
+      console.warn("[booking-windows] socket connect failed:", err.message),
+    );
+    socket.on("disconnect", (reason) =>
+      console.debug("[booking-windows] socket disconnected:", reason),
+    );
+
     socket.on(
       BOOKING_WINDOW_WS_EVENTS.PHASE,
       (_event: BookingWindowPhaseEvent) => {