feat: Worker Service - API endpoints

Implement and configure Worker Service to orchestrate data fetchers - Implement API endpoints for stock market data

src/Mercados.Infrastructure/Persistence/Repositories/ICotizacionGranoRepository.cs

@@ -0,0 +1,9 @@
+using Mercados.Core.Entities;
+
+namespace Mercados.Infrastructure.Persistence.Repositories
+{
+    public interface ICotizacionGranoRepository : IBaseRepository
+    {
+        Task GuardarMuchosAsync(IEnumerable<CotizacionGrano> cotizaciones);
+    }
+}