KBX v27 Standard Traceability

표준 요구	v27 구현
Explicit State	`KbxWorkflowBar`, T02/T03 state policy
Audit by Default	`KbxRecordLifecycle` + Item/Order Audit API
상태 변경과 수정 분리	`KbxRecordStatePolicy`, confirmed/deactivated read-only
Optimistic Concurrency UX	`KbxConflictResolver` + latest reload
Version Token	Item/Order explicit `version`
Unsaved Changes	`requiresDirty`, `requiresClean`, Workspace dirty binding
Permission UX / Backend Enforcement	`permissionByStatus` + FastEndpoints Permissions
위험한 확정	`KbxConfirm`, Workflow `confirm:true` enforcement
Write 정규화 / Read Projection	`catalog.item_details` + `erp_item_search_projection`
Outbox + Audit same transaction	Item Save/Deactivate, Order Save/Confirm
Idempotency	Order Confirm command receipt
재현성	canonical lifecycle scenarios + correlation-compatible Problem contract