Function parse_grpc_frames 

pub fn parse_grpc_frames(data: &[u8]) -> Vec<GrpcFrame>

Parse gRPC-encoded data into frames.

gRPC uses a length-prefixed framing format:

• 1 byte: compressed flag (0 = uncompressed, 1 = compressed)
• 4 bytes: message length (big-endian)
• N bytes: message payload