refactor: reorganize MAX_REASONABLE_VBAT_RAW constant placement

Move MAX_REASONABLE_VBAT_RAW constant to after predictor constants
for better organization. Groups domain-specific constants together
and improves code clarity by placing the constant near related
corruption detection logic.

Author: nerdCopter

src/parser/decoder.rs

@@ -13,9 +13,6 @@ pub const ENCODING_TAG2_3SVARIABLE: u8 = 10;
 
 // Predictor constants - directly from JavaScript reference
 pub const PREDICT_0: u8 = 0;
-
-// Maximum reasonable raw vbatLatest value before considering it corrupted
-const MAX_REASONABLE_VBAT_RAW: i32 = 1000;
 pub const PREDICT_PREVIOUS: u8 = 1;
 pub const PREDICT_STRAIGHT_LINE: u8 = 2;
 pub const PREDICT_AVERAGE_2: u8 = 3;
@@ -28,6 +25,10 @@ pub const PREDICT_VBATREF: u8 = 9;
 pub const PREDICT_LAST_MAIN_FRAME_TIME: u8 = 10;
 pub const PREDICT_MINMOTOR: u8 = 11;
 
+// Domain-specific constants for corruption detection
+// Maximum reasonable raw vbatLatest value before considering it corrupted
+const MAX_REASONABLE_VBAT_RAW: i32 = 1000;
+
 /// Decode a field value using the specified encoding
 pub fn decode_field_value(
     stream: &mut BBLDataStream,