Major achievements:
- Fixed TLV encoding format to match plugin expectations
- Header: version(2 bytes) + argc(2 bytes)
- Entry: tag(1) + reserved(1) + size(2) + data
- Removed duplicate implementation in method_dispatch.rs
- All FileBox methods working: open/read/write/close
- Successfully tested file I/O operations
This completes the v2 plugin system integration for FileBox.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
