Refactor ReadOutResQuery and add query handler

Refactored `ReadOutResQuery` to a record type implementing
`IRequest<OutResDto>` for MediatR. Introduced `ReadOutResHandler`
to handle the query, leveraging `IRepository` and `IMapper` for
database access and mapping. Added support for filtering by
`ActionId` and asynchronous query execution. Streamlined design
by moving `ProfileId` and `ActionId` to immutable `init`
properties in the record.

src/ReC.Application/OutResults/Queries/ReadOutResQuery.cs

@@ -1,8 +1,30 @@
-namespace ReC.Application.OutResults.Queries;
+using AutoMapper;
+using DigitalData.Core.Abstraction.Application.Repository;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using ReC.Application.Common.Dto;
+using ReC.Domain.Entities;
 
-public class ReadOutResQuery
+namespace ReC.Application.OutResults.Queries;
+
+public record ReadOutResQuery : IRequest<OutResDto>
 {
-    public long? ProfileId { get; set; }
+    public long? ProfileId { get; init; }
 
-    public long? ActionId { get; set; }
+    public long? ActionId { get; init; }
+}
+
+public class ReadOutResHandler(IRepository<OutRes> repo, IMapper mapper) : IRequestHandler<ReadOutResQuery, OutResDto>
+{
+    public async Task<OutResDto> Handle(ReadOutResQuery request, CancellationToken cancel)
+    {
+        var q = repo.Query;
+
+        if(request.ActionId is long actionId)
+            q = q.Where(res => res.ActionId == actionId);
+
+        var dtos = await q.ToListAsync(cancel);
+
+        return mapper.Map<OutResDto>(dtos);
+    }
 }