infra: add visual-tools and visual-mon servers, fix inventory
- Add 2 new Timeweb VPS (1vCPU/2GB/30GB, 550₽/мес each):
visual-tools 85.193.83.9 — Outline, Uptime Kuma
visual-mon 188.225.79.34 — Grafana, Prometheus, Loki, AlertManager
- Restructure hosts.ini into groups: [main] [tools] [mon] [all_servers]
- Update bootstrap.yml to target all_servers group
- Fix vault.yml: replace invalid YAML escape \$ with single-quoted string
in vault_authelia_admin_password_hash (caused YAML parse error)
Budget: ~1000 + 550 + 550 = 2100₽/мес (well within 3000₽ limit)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>