Enhancement for optical discs: Archive size limit, and erasure coding for error correction

I'm using drawfs on 25GB BD-RE discs, which have size and reliability issues, hence these requests:

1. Add feature to limit archive to specific output size, or to split output into chunks of a specified size.
2. Add reed-solomon coding to repair errors caused by scratches, bit-rot, or bad sectors.

Awesome program by the way! It greatly increases the read speed of optical media.

The issue names drawfs but no source files, tests, or entry points. Start by locating the archive output sizing and chunking logic, then the read path relevant to optical-media errors. Done would require a defined approach and validation for both requested features, but the issue does not specify implementation boundaries or tests.

Written by the indexing model from the issue text.