Function decode_v3_binary_game_data 

pub fn decode_v3_binary_game_data(
    wire: &[u8],
) -> Result<V3BinaryGameDataFrame, String>

Decode exactly one canonical protocol-v3 binary game-data envelope.

Unlike a derived Serde decoder, this validates the physical MessagePack representation: a map with string keys, binary UUID/payload fields, string encoding token, integer delivery stamps, and no trailing value.