fix(central-ui): notification deep link and relay use the stored N-form NotificationId

Notify.Send mints NotificationId as Guid "N" (no dashes) and the outbox parses it back into
the audit row's CorrelationId, so the Flow Debugger's Notify node linked and relayed a "D"
string the Notifications table never matches (found live: the report opened empty). The
link and RetryNotificationRequest now use "N", and the Notification report normalises any
Guid-shaped ?correlationId= to "N" so Audit Log and Flow Debugger callers both land.

Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Services/FlowDebugServiceTests.cs

@@ -120,7 +120,7 @@ public sealed class FlowDebugServiceTests : IDisposable
         Assert.True(result.Success, result.Message);
         Assert.Contains("re-queued", result.Message);
         var request = Assert.IsType<RetryNotificationRequest>(Assert.Single(_outboxRequests));
-        Assert.Equal(c.ToString("D"), request.NotificationId);
+        Assert.Equal(c.ToString("N"), request.NotificationId);
         Assert.Equal("tester", request.RequestedBy);
         Assert.Empty(_siteCallRequests);
     }