- Add join.js CLI for joining EdgeNet with public key identity
- Support generating new Pi-Key identities with Ed25519 signing
- Enable encrypted identity export/import (Argon2id + AES-256-GCM)
- Add multi-contributor demonstration and cross-verification
- Update main CLI to include join command
- Fix test file syntax errors and assertion bounds
- All 186 Rust tests pass, WASM module fully functional