allow startup with initial board mode and nearly no pin configs

rust/src/tank.rs

@@ -1,7 +1,7 @@
 use serde::Serialize;
 
+use crate::config::TankConfig;
 use crate::plant_hal::{BoardInteraction, HAL};
-use crate::config::{PlantControllerConfig, TankConfig};
 
 const OPEN_TANK_VOLTAGE: f32 = 3.0;
 pub const WATER_FROZEN_THRESH: f32 = 4.0;
@@ -156,10 +156,9 @@ impl TankState {
 }
 
 pub fn determine_tank_state(
-    board: &mut std::sync::MutexGuard<'_, HAL<'_>>,
-    config: &PlantControllerConfig,
+    board: &mut std::sync::MutexGuard<'_, HAL<'_>>
 ) -> TankState {
-    if config.tank.tank_sensor_enabled {
+    if board.config.tank.tank_sensor_enabled {
         match board.tank_sensor_voltage() {
             Ok(raw_sensor_value_mv) => TankState::Present(raw_sensor_value_mv),
             Err(err) => TankState::Error(TankError::BoardError(err.to_string())),