Dotmim.Sync provider package for SharpCoreDB.

Version: v1.9.1
Package: SharpCoreDB.Provider.Sync

• ✅ Aligned package metadata and version references to the synchronized 1.9.1 release line.
• ✅ Release automation now publishes all packable SharpCoreDB packages in CI/CD.

• Dotmim.Sync provider integration
• Change tracking and tombstone management components
• Sync metadata/schema support for SharpCoreDB
• Builder/adaptor abstractions for sync pipelines

• Package/docs synchronized to v1.9.0
• Documentation aligned with current provider components
• Guidance updated for modern sync and local-first scenarios

dotnet add package SharpCoreDB.Provider.Sync --version 1.9.0

• docs/INDEX.md
• src/SharpCoreDB.Provider.Sync/NuGet.README.md