Function decompress_from_reader 

pub fn decompress_from_reader<R: Read + Seek>(
    reader: &mut R,
    config: &EngineConfiguration,
) -> Result<Vec<u8>>

Decompress a CRSH file from a seekable reader.

Phase 1 (sequential): reads all block headers and payloads into memory. Phase 2 (parallel): decompresses the collected payloads via rayon.

This two-phase approach avoids sharing &mut R across rayon worker threads.

Errors

• CrushError::ExpansionLimitExceeded — decompressed size would exceed the ratio limit.
• CrushError::ChecksumMismatch — a block’s CRC32 does not match.
• CrushError::InvalidFormat — file is truncated or block data is corrupt.
• CrushError::IndexCorrupted — footer or index is missing or invalid.
• CrushError::Cancelled — cancelled via progress callback.
• CrushError::Io — underlying I/O error.