v0.6.2

Changes

Interview: acceptance criteria -- The interview phase now asks "what does done look like?" Extracts specific, testable acceptance criteria before decomposition. Criteria flow into decomposition context and north-star validation warns when contracts don't cover them.

Resume state fix -- pact resume no longer loses component task progress. Previously, re-entering the decompose phase overwrote all component_tasks with fresh empty objects. Now preserves existing completed/failed status. State also flushes to disk immediately after task setup, surviving crashes and validation failures.