- Add scripts/generate-timmy-nsec.sh wrapper and TypeScript keygen script
that outputs nsec/npub and a ready-to-paste export line
- Add OPERATOR.md with persistent identity setup instructions
- Document TIMMY_NOSTR_NSEC in replit.md secrets table
- Startup log already uses INFO (persisted) vs WARN (ephemeral)
Fixes#48
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>