Add calendar integrations and collaboration updates

backend/src/Socialize.Api/Modules/ContentItems/Services/ContentItemActivityWriter.cs

@@ -0,0 +1,31 @@
+using Socialize.Api.Data;
+using Socialize.Api.Modules.ContentItems.Contracts;
+using Socialize.Api.Modules.ContentItems.Data;
+
+namespace Socialize.Api.Modules.ContentItems.Services;
+
+public class ContentItemActivityWriter(
+    AppDbContext dbContext)
+    : IContentItemActivityWriter
+{
+    public async Task WriteAsync(ContentItemActivityWriteModel model, CancellationToken cancellationToken = default)
+    {
+        ContentItemActivityEntry entry = new()
+        {
+            Id = Guid.NewGuid(),
+            WorkspaceId = model.WorkspaceId,
+            ContentItemId = model.ContentItemId,
+            EventType = model.EventType,
+            EntityType = model.EntityType,
+            EntityId = model.EntityId,
+            Summary = model.Summary,
+            ActorUserId = model.ActorUserId,
+            ActorEmail = model.ActorEmail,
+            MetadataJson = model.MetadataJson,
+            CreatedAt = DateTimeOffset.UtcNow,
+        };
+
+        dbContext.ContentItemActivityEntries.Add(entry);
+        await dbContext.SaveChangesAsync(cancellationToken);
+    }
+}