pub fn parse_trailer(buf: &[u8]) -> Result<Trailer, U3vError>Expand description
Parse a U3V stream trailer from raw bytes.
Trailer layout (little-endian):
[0..4] prefix 0x54563355 ("U3VT")
[4..6] reserved
[6..8] trailer_size
[8..12] status
[12..20] block_id (u64)
[20..28] valid_payload_size (u64, may be absent)