- Removed unnecessary IConfiguration and SqlServerCacheOptions parameters from AddEnvelopeGenerator
- Added EnsureAllServicesConfigured() to validate that all required service methods are invoked
- Introduced _addingStatus dictionary to track configuration status
- Renamed internal queue field to _serviceRegs for consistency
- Added AddServices() method to explicitly register EnvelopeGenerator services
- Improved AddLocalization() to support optional custom localization options