nx_machine_arch_test.nx

nx_machine_arch_test.nx -- verify the machine-graph + kinematics + process-class abstractions are reusable across any additive machinery, with FDM polymer (Qidi X-Max 3) as the reference impl. Operator directive (2026-05-20, verbatim): "we are focused on qidi but i wanted the architecture mapped out so it was reusable on any additive machinery" Closed-form invariants: (a) Existing FDM factories (Qidi/Prusa/Voron/Bambu) ALL carry process_class == NX_PROCESS_FDM_POLYMER (architecture compliance with the multi-process taxonomy) (b) Each FDM factory has a valid kinematics class (c) Kinematics predicates classify all 8 classes consistently: - finite_z: only CONVEYOR is false (belt = unbounded Z) - xy_decoupled: Cartesian/Gantry/SCARA/Robot/Conveyor true; CoreXY/HBot/Delta false - 5_axis_or_more: only Robot_6DOF - bed_translates: Conveyor + Cartesian (bed-slinger) (d) nx_machine_set_process accepts valid processes, rejects invalid (e) Hypothetical DIW concrete machine can be constructed from the same NxMachineGraph primitive by composing a generic allocation + setter chain -- proves the substrate is NOT FDM-specific expect_exit: 0 license_tier: ORIGINAL