v0.5.0 — Priced Reality

First breaking release, shipped through the project's own Decision Process: 3 ADRs, 3/3 dedicated model reviews (Codex, Gemini, DeepSeek), adoption warrants in .warrants/. Every v0.4 hash remains valid — what changed is what computation costs: hash-thunk evaluation (lazy left-spine; dead branches never fetched), size-priced ATP with the normative memory bound size − 1 ≤ spent, genesis intrinsic I/K/S, entropy–coherence coupling with crystallization to {am=65535, en=−32768}. Two oracles (Book I + Book II), 46 + 9 conformance vectors, 2103 property checks. Migration guide in CHANGELOG.