Updated DigitalData.Core.Abstraction.Application from 1.4.0 to 1.6.0 across all relevant project files and package configs. Also updated DigitalData.Core.Infrastructure from 2.4.5 to 2.6.1 in EnvelopeGenerator.Infrastructure.csproj. No other code changes were made.
- 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 full implementation for CreateAnnotationCommand and its handler:
- Introduced `PSPDFKitInstantJSON` property to the command
- Injected repositories for `Signature` and `Annotation`
- Implemented query filtering for Envelope and Receiver
- Added annotation creation from parsed PSPDFKit JSON
- Created helper method `ParsePSPDFKitInstantJSON` for JSON parsing
- 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
