Removed EnvelopeGenerator.CommonServices DLL reference from BBTests project file, updated project GUIDs to lowercase, added WCFMetadata ItemGroup for connected services, and set BBTests Release config to use Debug in solution file.
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 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
