Added shared projects

LiteCharms.Features/Products/Queries/Handlers/GetProductPriceQueryHandler.cs

@@ -0,0 +1,29 @@
+using LiteCharms.Extensions;
+using LiteCharms.Infrastructure.Database;
+using LiteCharms.Models;
+
+namespace LiteCharms.Features.Products.Queries.Handlers;
+
+public class GetProductPriceQueryHandler(IDbContextFactory<LeadGeneratorDbContext> contextFactory) : IRequestHandler<GetProductPriceQuery, Result<ProductPrice>>
+{
+    public async ValueTask<Result<ProductPrice>> Handle(GetProductPriceQuery request, CancellationToken cancellationToken)
+    {
+		try
+		{
+            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var productPrice = await context.ProductPrices.AsNoTracking()
+                .Where(pp => pp.ProductId == request.ProductId && pp.Active)
+                .OrderByDescending(pp => pp.CreatedAt)
+                .FirstOrDefaultAsync(cancellationToken);
+
+            return productPrice is not null 
+                ? Result.Ok(productPrice.ToModel())
+                : Result.Fail<ProductPrice>(new Error($"Product price {request.ProductId} not found."));
+        }
+        catch (Exception ex)
+		{
+            return Result.Fail<ProductPrice>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+}