Enhance user settings management by adding new properties and updating related functionality

This commit introduces additional user settings properties, including TrendStrongAgreementThreshold, SignalAgreementThreshold, AllowSignalTrendOverride, and DefaultExchange, to the User entity and associated DTOs. The UserController and UserService are updated to handle these new settings, allowing users to customize their trading configurations more effectively. Database migrations are also included to ensure proper schema updates for the new fields.

src/Managing.Infrastructure.Database/PostgreSql/ManagingDbContext.cs

@@ -103,6 +103,8 @@ public class ManagingDbContext : DbContext
             entity.Property(e => e.TelegramChannel).HasMaxLength(255);
             entity.Property(e => e.MinimumConfidence)
                 .HasConversion<string>(); // Store enum as string
+            entity.Property(e => e.DefaultExchange)
+                .HasConversion<string>(); // Store enum as string
             
             // Create indexes for performance
             entity.HasIndex(e => e.Name).IsUnique();