- Implement shouldUseGlobalDaemon() with multi-repo detection
- Auto-detect 4+ beads repos and prefer global daemon
- Support BEADS_PREFER_GLOBAL_DAEMON env var for explicit control
- Add 'bd daemon --migrate-to-global' migration helper
- Update auto-start logic to use global daemon when appropriate
- Update documentation in AGENTS.md and README.md
Amp-Thread-ID: https://ampcode.com/threads/T-9af9372d-f3f3-4698-920d-e5ad1486d849
Co-authored-by: Amp <amp@ampcode.com>