Queue chat bulk actions through SQL outbox

server/QMax.Api/Data/Entities/Chat.cs

@@ -14,6 +14,13 @@ public sealed class Chat
     public bool IsPinned { get; set; }
     public bool IsMuted { get; set; }
     public bool IsArchived { get; set; }
+    public DateTimeOffset? DeletedAt { get; set; }
+    public DateTimeOffset? HistoryClearedAt { get; set; }
+    public ChatPendingMaxAction? PendingMaxAction { get; set; }
+    public DateTimeOffset? PendingMaxActionRequestedAt { get; set; }
+    public DateTimeOffset? PendingMaxActionLastAttemptAt { get; set; }
+    public int PendingMaxActionAttempts { get; set; }
+    public string? PendingMaxActionError { get; set; }
     public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
     public DateTimeOffset UpdatedAt { get; set; } = DateTimeOffset.UtcNow;
     public ICollection<Message> Messages { get; set; } = new List<Message>();

server/QMax.Api/Data/Entities/Enums.cs

@@ -8,6 +8,12 @@ public enum ChatKind
     MaxDialog = 3
 }
 
+public enum ChatPendingMaxAction
+{
+    ClearHistory = 0,
+    DeleteChat = 1
+}
+
 public enum MessageDirection
 {
     Incoming = 0,

server/QMax.Api/Data/QMaxDbContext.cs

@@ -19,6 +19,8 @@ public sealed class QMaxDbContext(DbContextOptions<QMaxDbContext> options) : DbC
         modelBuilder.Entity<User>().HasIndex(x => x.PhoneNumber);
         modelBuilder.Entity<UserSession>().HasIndex(x => x.RefreshTokenHash).IsUnique();
         modelBuilder.Entity<Chat>().HasIndex(x => x.ExternalId).IsUnique();
+        modelBuilder.Entity<Chat>().HasIndex(x => x.DeletedAt);
+        modelBuilder.Entity<Chat>().HasIndex(x => new { x.PendingMaxAction, x.PendingMaxActionRequestedAt });
         modelBuilder.Entity<Message>().HasIndex(x => new { x.ChatId, x.SentAt });
         modelBuilder.Entity<Message>().HasIndex(x => x.ExternalId);
         modelBuilder.Entity<MessageAttachment>().HasIndex(x => x.StorageFileName).IsUnique();
@@ -30,6 +32,10 @@ public sealed class QMaxDbContext(DbContextOptions<QMaxDbContext> options) : DbC
             .Property(x => x.Kind)
             .HasConversion<string>();
 
+        modelBuilder.Entity<Chat>()
+            .Property(x => x.PendingMaxAction)
+            .HasConversion<string>();
+
         modelBuilder.Entity<Message>()
             .Property(x => x.Direction)
             .HasConversion<string>();