ThothII/docs/adr/0002-kind-independent-evidence-identifiers.md

Keep Evidence identifiers independent from kind

An Evidence Unit keeps the same identifier when its kind is corrected or its Source Evidence is unambiguously renamed; kind remains a separate validated field. This avoids breaking citations and evaluation fixtures for a classification change, while genuine semantic splits receive new identifiers so independent units never share an identity. Identifiers use evidence:<slug>, are assigned once, persisted in the manifest and are never recomputed automatically from mutable titles, paths or content hashes.