- Added repository access to retrieve signatures and their annotations for a given envelope.
- Updated `BurnInstantJSONAnnotationsToPDF` to accept `envelopeId` and load elements from the database.
- Updated imports to include `DigitalData.Core.Abstractions` and Entity Framework references.
- Added `UnstructuredAnnotations` property to handle annotations without structured IDs
- Changed default `hasStructuredID` to `False`, set to `True` only after successful parsing
- Updated `AddInstantJSONAnnotationToPDF` to process annotations directly instead of grouping by receiver
- Simplified logic for reversing annotations and applying seal positioning
