Metrics

# Summary across all monitors (last 24 hours)
griffin metrics

# Metrics for a specific environment
griffin metrics production

# Different time windows
griffin metrics --period 1h    # Last hour
griffin metrics --period 6h    # Last 6 hours
griffin metrics --period 24h   # Last 24 hours (default)
griffin metrics --period 7d    # Last 7 days
griffin metrics --period 30d   # Last 30 days

# JSON output for scripting
griffin metrics --json