Power Control - Domain Power Service Integration

[deepak-poornachandra]

While the PowerShelf manager handles PSU lifecycle, rack administration coordinates:

• Rack power control
• Power sequencing for safe bring‑up or shutdown
• Communicating power state changes to DPS

[ajf]

cc @vishnu-rangayyan @Matthias247

[ajf]

@Matthias247 or @zhaozhongn do we have a design doc for this yet?