Added budget update

Added portfolio and programme value calculator endpoints

PostFundManagement.Application/Services/Grants/GrantsService.cs

@@ -167,7 +167,8 @@ public sealed class GrantsService(IDbContextFactory<ApplicationDbContext> contex
                 Name = request.Name,
                 Amount = request.Amount,
                 CreatedBy = userId,
-                CreatedAt = DateTime.UtcNow
+                CreatedAt = DateTime.UtcNow,
+                Status = ApprovalStatus.Pending
             };
 
             context.Budgets.Add(budget);
@@ -273,4 +274,19 @@ public sealed class GrantsService(IDbContextFactory<ApplicationDbContext> contex
 
             return Result.OkIf(changedTotal > 0, UpdateError.Create("Failed to update the contract."));
         }));
+
+    public async Task<Result> UpdateBudgetAsync(UpdateBudgetRequest request, Guid userId, CancellationToken cancellationToken = default) =>
+        await Result.Try((Func<Task<Result>>)(async () =>
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var changedTotal = await context.Budgets
+                .Where(f => f.Id == request.BudgetId)
+                .ExecuteUpdateAsync(f => f
+                    .SetProperty(u => u.ApprovedBy, userId)
+                    .SetProperty(u => u.UpdatedAt, DateTime.UtcNow)
+                    .SetProperty(u => u.Status, request.Status), cancellationToken);
+
+            return Result.OkIf(changedTotal > 0, UpdateError.Create("Failed to update budget"));
+        }));
 }