chore: rename data managers to just managers

src/recording_data/day.rs

@@ -2,7 +2,7 @@ use futures::{TryStream, TryStreamExt as _};
 use snafu::{OptionExt as _, ResultExt as _, Snafu};
 use std::num::ParseIntError;
 
-use super::{CreateListerSnafu, ListError, Month, RecordingDataManager, Year};
+use super::{CreateListerSnafu, ListError, Month, RecordingManager, Year};
 
 pub type Day = u8;
 
@@ -32,7 +32,7 @@ pub enum DayEntryError {
     ParseError { source: TakeError },
 }
 
-impl RecordingDataManager {
+impl RecordingManager {
     pub async fn days(
         &self,
         year: Year,