Post-migration sweep of legacy file-based secret code:
- deploy.py + doctor.py checked for the token *file* → false 'secret not found'
warnings now that tokens live in the vault; use read_secret (backend-aware)
- drop now-unused SECRETS_DIR imports
- refresh stale docstring/prompt text (${secret} 'reads ~/.castle/secrets' →
'via the active backend'; SecretsEditor add-prompt)
Kept (legitimate file paths): the bootstrap tier (OPENBAO_* token/unseal,
cloudflared creds dir) + the rendered 0600 env files.
Paul Payne
34061d3a68