tree 04e1646e53df06e9ee594d9924acdc3e087609f6
parent 9a5dcfac079a2f80b142427e5007d7165c22c8cc
author gBMC Team <gbmc-core@google.com> 1788376098 -0700
committer Copybara-Service <copybara-worker@google.com> 1788376179 -0700

Add tlBMC sensor value override functionality

Introduces thread-safe software override support in the `milotic_tlbmc::Sensor` base class and overridden sensors.

Key changes:
- Adds `SetOverrideValue()`, `ClearOverride()`, `IsOverridden()`, and `GetOverrideValue()` to `Sensor`, guarded by `override_mutex_`.
- Updates `PollingBaseSensor::GetSensorData()` and `BulkSensor::GetSensorData()` to return the active override value when present.
- Updates `Sensor::GetSensorAttributesDynamic()` and `BulkSensor::GetSensorAttributesDynamic()` to report `STATUS_READY` when overridden.
- Shields `SyncPollingSensor::RefreshOnceAsync()` and `AdcSensor::RefreshOnceAsync()` by skipping physical hardware reads while an override is active and immediately dispatching the callback with the overridden reading.
- Adds comprehensive unit tests in `polling_base_sensor_test.cc` verifying override set, get, clear, dynamic attributes, threshold evaluations, and polling shielding.

Google-Bug-Id:550410302
PiperOrigin-RevId: 975255792
Change-Id: I3e793b2f0d75a78a4c97e8612b6096d5bf01bd1d