Show current status of an energy monitoring component.
Displays real-time measurements including voltage, current, power,
power factor, and frequency. For 3-phase EM components, shows
per-phase data and totals.
# Show energy monitor status
shelly energy status shelly-3em-pro
# Show specific component by ID
shelly energy status shelly-em 0
# Specify component type explicitly
shelly energy status shelly-em --type em1
# Output as JSON for scripting
shelly energy status shelly-3em-pro -o json