feat: automatically apply EF Core database migrations on service startup across all services

services/booking-service-net/src/BookingService.API/Program.cs

@@ -1,3 +1,4 @@
+using Microsoft.EntityFrameworkCore;
 using Asp.Versioning;
 using FluentValidation;
 using Hellang.Middleware.ProblemDetails;
@@ -146,6 +147,14 @@ try
     app.MapControllers();
 
     // EN: Run the application / VI: Chạy ứng dụng
+    // EN: Auto-apply EF Core migrations on startup
+    // VI: Tự động áp dụng EF Core migrations khi khởi động
+    using (var scope = app.Services.CreateScope())
+    {
+        var dbContext = scope.ServiceProvider.GetRequiredService<BookingContext>();
+        await dbContext.Database.MigrateAsync();
+    }
+
     app.Run();
 }
 catch (Exception ex)