feat: Resonance Tensor + CoA + shutdown fix + rolling release

Two Opus research discoveries implemented:
- Resonance Tensor (Ψ): cross-signal geometric mean agreement,
  21 learnable params (7×7 coherence matrix), Hebbian learning
- CoA (Coactivation Attention): D.N.A. coactivation pairs as
  attention via inverted index + destiny gate
- Subword Bridge: BPE D.N.A. lifted to word-level bigrams (5075 connections)

Dario Equation now 9 signals: B + α·H + β·F + γ·A + sw·S + r·R + T + λ·Ψ + c·C

Also: fix goroutine shutdown race (SIGSEGV on Close),
remove version numbers (rolling release), update speech examples.

69 tests green.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neoleo.c: regenerate single-file organism (20,955 lines)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

release: Leo 2.2 — Janus Architecture

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

v2.1.0: clarify D.N.A. ancestry, gitignore test artifacts, update lin…

…e count

- README: make explicit that "zero pretrained weights" means D.N.A. structural
  geometry inherited from trained Llama 3 ancestor (checkpoint discarded)
- README: bump version 2.0 → 2.1, update line count 3000+ → 5000+
- .gitignore: add tests/*.md, tests/*.py, tests/test_leo to prevent
  Python-era test artifacts from leaking into releases

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Leo 2.0: The Dario Equation