⚡ Sped up and reduce storage usage of read receipt

DysonNetwork.Sphere/Storage/Handlers/MessageReadReceiptFlushHandler.cs

@@ -0,0 +1,37 @@
+using DysonNetwork.Sphere.Chat;
+using EFCore.BulkExtensions;
+using Microsoft.EntityFrameworkCore;
+using NodaTime;
+using Quartz;
+
+namespace DysonNetwork.Sphere.Storage.Handlers;
+
+public class MessageReadReceiptFlushHandler(IServiceProvider serviceProvider) : IFlushHandler<MessageReadReceipt>
+{
+    public async Task FlushAsync(IReadOnlyList<MessageReadReceipt> items)
+    {
+        using var scope = serviceProvider.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<AppDatabase>();
+
+        await db.BulkInsertAsync(items);
+    }
+}
+
+public class ReadReceiptFlushJob(FlushBufferService fbs, MessageReadReceiptFlushHandler hdl) : IJob
+{
+    public async Task Execute(IJobExecutionContext context)
+    {
+        await fbs.FlushAsync(hdl);
+    }
+}
+
+public class ReadReceiptRecyclingJob(AppDatabase db) : IJob
+{
+    public async Task Execute(IJobExecutionContext context)
+    {
+        var cutoff = SystemClock.Instance.GetCurrentInstant().Minus(Duration.FromDays(30));
+        await db.ChatReadReceipts
+            .Where(r => r.CreatedAt < cutoff)
+            .ExecuteDeleteAsync();
+    }
+}