feat: implement PmUserQueryService and integrate into AccountApplication for user ID retrieval

ProgramManager/src/Infrastructure/GozareshgirProgramManager.Infrastructure/Services/User/PmUserQueryService.cs

@@ -0,0 +1,22 @@
+using GozareshgirProgramManager.Application.Modules.Users.Queries.GetSingleUser;
+using MediatR;
+using Shared.Contracts.PmUser;
+
+namespace GozareshgirProgramManager.Infrastructure.Services.User;
+
+public class PmUserQueryService : IPmUserQueryService
+{
+    public readonly IMediator _mediator;
+
+    public PmUserQueryService(IMediator mediator)
+    {
+        _mediator = mediator;
+    }
+
+    public async Task<long?> GetCurrentPmUserIdFromAccountId(long accountId)
+    {
+        var query = new GetSingleUserQuery(accountId.ToString());
+        var result = await _mediator.Send(query);
+        return result.Data?.AccountId ?? null;
+    }
+}