- Updated `ProfileController` to always return `Ok(profile)` instead of `NotFound()`.
- Changed `ReadProfileQuery` to return a non-nullable `ProfileDto`, throwing `NotFoundException` if not found.
- Modified `ReadProfileHandler` to handle the new return type and throw exceptions appropriately.
- Adjusted `ReadProfileAsync` to align with the new non-nullable return type.
- Added dependency on `DigitalData.Core.Exceptions` for improved error handling.
