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Per-operation model replacing mrp.workorder for plating. Each step instantiates from a recipe operation node (recipe_node_id link). Container/step nodes from the recipe template are rendered at view time via that link — they don't get rows here. See spec §5.2 Option A. 7-state machine: pending → ready → in_progress → done, plus paused, skipped, cancelled. button_start/button_finish enforce the transitions. Job header gets step_ids + step_count, step_done_count, step_progress_pct, current_step_id (computed from steps). Equipment, audit fields, plating-spec fields, time logs, and release-ready validation come in Tasks 1.6 and 1.7. Manifest 19.0.8.3.1 → 19.0.8.4.0. Part of: native job model migration (spec 2026-04-25) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>