Benchmark Infrastructure and Implementations for Fixed-Width vs. Multiprecision Digit Generation in JSON Canonicalization

Reproducibility artifact for the paper: Fixed-Width vs. Multiprecision Digit Generation for JSON Canonicalization: A Four-Algorithm Empirical Study. v1.0.1: Abstract rewrite (methodology-first framing), DOI badges, c0-tracking corrections in Dragonbox and Rust fixed-width implementations, packaging fix (excludes Rust build artifacts). Contains all source code (8 implementations across Go and Rust), 286,362 oracle vectors, benchmark results, statistical analysis, and the paper PDF.