feat(luxos): implement _is_mining using CurtailMode from config

[wilfredallyn]

Problem

MinerData.is_mining always returns True for LuxOS miners — even when the miner is in curtail sleep mode with 0 TH/s hashrate and PSU powered off.

Root cause: The LUXMiner backend has no _is_mining() implementation. The base class returns None, and MinerData.is_mining defaults to True, so the default is never overridden.

This was discovered when writing an automated script to sleep/wake. The scheduler used is_mining which was always True.

Solution

Add _is_mining() to LUXMiner using the CurtailMode field from the existing config RPC response. No new API calls needed — config is already fetched for MAC address, fault light, and wattage limit.

LuxOS CurtailMode values (verified on hardware)

CurtailMode	Miner State	_is_mining returns
"Sleep"	Curtail sleep — boards off, PSU off, 0 TH/s	False
"WakeUp"	Ramping up from sleep	True
None	Running normally	True

Other signals discovered (not used, but documented)

From config: IsPowerSupplyOn (False when sleeping)
From devs: Status ("Dead" when sleeping, "Alive" otherwise), IsRamping (True during wake ramp)

Changes

pyasic/miners/backends/luxminer.py:

• Added DataOptions.IS_MINING to LUXMINER_DATA_LOC, using existing rpc_config data
• Added _is_mining() method: returns False when CurtailMode == "Sleep", True otherwise

Testing

Verified against real S19K Pro running LuxOS 2026.2.11.043533 in three states:

1. Running — CurtailMode: None, is_mining now correctly returns True
2. Sleeping (after curtail sleep) — CurtailMode: "Sleep", is_mining now correctly returns False
3. Waking (during ramp after curtail wakeup) — CurtailMode: "WakeUp", is_mining returns True (boards are active, just ramping)

Previously all three states returned True.