v1.0.3 - Supersede writes strategy and session init improvements

[Tarquinen]

Summary

• Add supersede writes strategy: New pruning strategy that automatically prunes write tool inputs when the same file is subsequently read, reducing context overhead since the current file state is already captured in the read result
• Improve session initialization: Check compaction timestamp on session init for improved state handling

Full Changelog: v1.0.2...v1.0.3