Support querying multiple profile views in ReadProfileView

Refactored ReadProfileViewQuery and handler to return multiple profiles as IEnumerable<ProfileViewDto>. Made Id parameter optional to allow fetching all profiles. Updated exception handling for empty results.

src/ReC.Application/Profile/Queries/ReadProfileViewQuery.cs

@@ -8,26 +8,29 @@ using ReC.Domain.Views;
 
 namespace ReC.Application.Profile.Queries;
 
-public record ReadProfileViewQuery : IRequest<ProfileViewDto>
+public record ReadProfileViewQuery : IRequest<IEnumerable<ProfileViewDto>>
 {
-    public long Id { get; init; }
+    public long? Id { get; init; } = null;
 
     public bool IncludeActions { get; init; } = true;
 }
 
 public class ReadProfileViewQueryHandler(IRepository<ProfileView> repo, IMapper mapper)
-    : IRequestHandler<ReadProfileViewQuery, ProfileViewDto>
+    : IRequestHandler<ReadProfileViewQuery, IEnumerable<ProfileViewDto>>
 {
-    public async Task<ProfileViewDto> Handle(ReadProfileViewQuery request, CancellationToken cancel)
+    public async Task<IEnumerable<ProfileViewDto>> Handle(ReadProfileViewQuery request, CancellationToken cancel)
     {
         var query = request.IncludeActions
             ? repo.Query.Include(p => p.Actions)
             : repo.Query;
 
-        var profile = await query.SingleOrDefaultAsync(p => p.Id == request.Id, cancel);
+        if (request.Id is long id)
+            query = query.Where(p => p.Id == id);
 
-        return profile is null
+        var profiles = await query.ToListAsync(cancel);
+
+        return profiles is null || profiles.Count == 0
             ? throw new NotFoundException($"Profile {request.Id} not found.")
-            : mapper.Map<ProfileViewDto>(profile);
+            : mapper.Map<IEnumerable<ProfileViewDto>>(profiles);
     }
 }