Refactor async logging to synchronous; improve error handling consistency across modules.

Software/MainBoard/rust/src/plant_state.rs

@@ -1,6 +1,6 @@
-use bincode::{Decode, Encode};
 use crate::hal::Moistures;
 use crate::{config::PlantConfig, hal::HAL, in_time_range};
+use bincode::{Decode, Encode};
 use chrono::{DateTime, TimeDelta, Utc};
 use chrono_tz::Tz;
 use serde::{Deserialize, Serialize};