- Added full implementation of BurnElementAnnotsToPDF method
- Integrated PdfEditor for background rendering
- Added annotation handling for form fields, images, and ink types
- Included error handling for PDF loading and saving
- Removed unused DigitalData.Core.Abstractions namespace
- Inject IRepository<Signature> for accessing signature and annotation data
- Implement BurnAnnotsToPDF method to process annotations from DB or JSON
- Add BurnElementAnnotsToPDF and BurnInstantJSONAnnotsToPDF stubs
- Integrate EF Core Include for loading related entities
