refactor: reorganize client constants

src/dsp408/mapper/channel.rs

@@ -615,7 +615,7 @@ pub fn raw_to_ratio(value: u16) -> Result<types::Ratio, MapperError> {
 pub fn knee_db_to_raw(db: u16) -> Result<u16, MapperError> {
     validate_range(
         db,
-        client_constants::COMPRESSOR_KNEE_DB_RANGE,
+        client_constants::KNEE_DB_RANGE,
         || format!("Invalid compressor knee: {db}"),
     )?;