Release v0.1.16 - Graph Node with persistence support

Features:
- Persistence support using redb storage backend
- GraphDatabase.open() factory method for opening existing databases
- isPersistent() and getStoragePath() methods
- Node labels support
- Comprehensive benchmark suite

Performance:
- Batch Node Creation: 131K+ ops/sec
- Node Creation: 9.17K ops/sec
- Vector Search: 2.35K ops/sec

Platforms:
- Linux x64 (glibc)
- Linux arm64 (glibc)
- macOS x64
- macOS arm64 (M1/M2)
- Windows x64