Track overcurrent issues during pump operation

- Added `overcurrent_ma` field to pump results for capturing overcurrent data.
- Enhanced pumping logic to record and propagate overcurrent issues per plant.
- Updated `PumpState` and `PlantState` to handle overcurrent errors.

Software/MainBoard/rust/src/plant_state.rs

@@ -51,16 +51,27 @@ pub enum PumpError {
         failed_attempts: usize,
         max_allowed_failures: usize,
     },
+    OverCurrent {
+        current_ma: u16,
+        max_allowed_ma: u16,
+    },
 }
 
 #[derive(Debug, Serialize)]
 pub struct PumpState {
     consecutive_pump_count: u32,
     previous_pump: Option<DateTime<Utc>>,
+    pub overcurrent_error: Option<u16>,
 }
 
 impl PumpState {
     fn is_err(&self, plant_config: &PlantConfig) -> Option<PumpError> {
+        if let Some(current_ma) = self.overcurrent_error {
+            return Some(PumpError::OverCurrent {
+                current_ma,
+                max_allowed_ma: plant_config.max_pump_current_ma,
+            });
+        }
         if self.consecutive_pump_count > plant_config.max_consecutive_pump_count as u32 {
             Some(PumpError::PumpNotWorking {
                 failed_attempts: self.consecutive_pump_count as usize,
@@ -172,6 +183,7 @@ impl PlantState {
             pump: PumpState {
                 consecutive_pump_count,
                 previous_pump,
+                overcurrent_error: None,
             },
             sensor_a_firmware_build_minutes: a_builds[plant_id],
             sensor_b_firmware_build_minutes: b_builds[plant_id],