Add calendar integrations and collaboration updates

backend/tests/Socialize.Tests/CalendarIntegrations/CalendarImportSyncServiceTests.cs

@@ -0,0 +1,16 @@
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+
+namespace Socialize.Tests.CalendarIntegrations;
+
+public class CalendarImportSyncServiceTests
+{
+    [Fact]
+    public void NormalizeSyncError_truncates_errors_to_stored_length()
+    {
+        string message = new('x', 3000);
+
+        string normalized = CalendarImportSyncService.NormalizeSyncError(message);
+
+        Assert.Equal(2048, normalized.Length);
+    }
+}