Initial public ModelForge release

docs/architecture/adr/0020-immutable-evaluation-suite-revisions.md

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+# ADR 0020 — Evaluation suite revisions are immutable
+
+Status: accepted
+
+Queries, relevance labels/grades, critical flags, metrics, top-K and retrieval configuration form
+one content-digested revision. Runs reference that revision permanently. A change creates a new
+revision, preserving reproducibility and preventing retrospective baseline changes.