fix: round hours played to 2 decimals before updating total

Rounds the HoursPlayed value to two decimal places when updating the tester's total playtime. This change ensures:

- Avoiding unnecessarily long decimal precision.
- Making the total hours more readable for clients (e.g., 7.25h instead of 7.251237h).
- Preventing floating-point accumulation errors when summing many small fractions of hours.

Author: DevD4v3

src/UseCases/Testers/UpdatePlaytime.cs

@@ -28,11 +28,12 @@ public async Task<Result> ExecuteAsync(string accessKey, UpdatePlaytimeRequest r
         if (validationResult.IsFailed())
             return validationResult.Invalid();
 
+        double roundedHours = Math.Round(request.HoursPlayed, 2);
         int affectedRows = await dbContext
             .Set<Tester>()
             .Where(t => t.AccessKey == accessKey)
             .ExecuteUpdateAsync(setters => setters
-                .SetProperty(t => t.TotalHoursPlayed, t => t.TotalHoursPlayed + request.HoursPlayed));
+                .SetProperty(t => t.TotalHoursPlayed, t => t.TotalHoursPlayed + roundedHours));
 
         return affectedRows == 0 ? Result.NotFound() : Result.Success();
     }