Adds a Pump Limit Override: the pump-1 current command is clamped to a
soft 4000 mA ceiling (the 1 W diode rating) by default, liftable to the
8000 mA hard protocol max only while the new amp_pump_override switch is
ON. Fail-safe: the override defaults OFF on every boot, and switching it
OFF immediately re-clamps a running setpoint back down to 4000 mA so the
booster cannot stay parked above 1 W. The HA pump-1 number now spans
0..8000 mA; values above 4000 take effect only with the override on.
PUMP_CURRENT_MAX_MA is split into PUMP_CURRENT_SOFT_MAX_MA (4000) and
PUMP_CURRENT_HARD_MAX_MA (8000). README/BOM updated. Builds clean
(flash 59.3%); not yet flashed (ESP32 needs USB, no OTA).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
