The foundation for the "watch the mathematics execute" cockpit. Each meaningful
crypto operation will emit one Event carrying its LaTeX notation plus the real
runtime values, tagged with party + phase. One stream feeds both a terminal view
(ASCII/Unicode) and a browser view (typeset KaTeX) — no double-maintenance.
- Off by default with near-zero cost: Emit/EmitFunc return immediately when no
sink is attached (atomic fast path), so instrumentation is free in normal runs.
- Sinks: ChanSink (buffered, drops rather than stalling the ceremony), SliceSink
(tests). Short() elides ~77-digit values for compact display.
Tests: disabled-is-cheap, monotonic sequence + context stamping, elision.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
