serialize.js 1.1.0 — production mode arrives and the port gets 1.76x faster

The write path forks once at module load: NODE_ENV=production selects production variants that trust the caller exactly as a C release build does — per-operation caller validation gone, the sticky overflow latch and every read-side content refusal kept in every mode, the wire byte-identical in both (golden-pinned). Seven measured optimizations land from the speed campaign (persistent DataView reset, snapshot reads, u64 through the scratch view, single-question write tails, fused writer core, allocation-free bulk bytes, try-path tails), each carrying its numbers in its commit. The benchmark gains 4-decimal CSV resolution and the README documents the V8 inlining-flag recommendation for throughput-sensitive use. End to end vs 1.0.0 checked: ~1.76x faster blended; raw bitpacker write +30% in production mode alone.