- New table servidor_metricas_history (cpu%, ram%, swap%, disco%, tcp, load1) - Each heartbeat inserts a compact row (~60 bytes) - GET /app/servidor/:id/metricas-history?horas=24 returns the data - Daily cron at 3AM purges rows older than 7 days - ~1.2 MB per server per 7 days at 30s interval Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>