syncular-ssp2 0.2.0

Syncular v2 SSP2 wire codec, implemented from SPEC.md alone (language-neutrality POC)
Documentation

ssp2 — Syncular v2 wire codec (Rust POC)

A fresh implementation of the SSP2 envelope, the SSG2 rows-segment format, the §2.4 row codec, §8 realtime control messages, and the §11 canonical JSON debug rendering — built from SPEC.md alone (no reference to the v1 Rust tree or the v2 TypeScript implementations) to prove the written protocol contract is language-neutral. Conformance is pinned by the golden vectors in spec/vectors/.