Moves one or more joints by a bounded amount and returns when the move is done. Needs an armed session.

Each joint follows its own trapezoid at fraction × max_velocity × 0.75 and fraction × its jog acceleration (or its described maximum acceleration, if lower). Shorter profiles are stretched so all joints start and finish together. The points are sampled at the core's cycle and sent with prepare_trajectory and start_trajectory. The target must be inside the joint's limits.

Errors: joint_move_invalid, joint_move_limits, joint_move_units, joint_move_description_invalid, joint_move_too_many_points, joint_move_prepare_timeout, joint_move_prepare_busy, joint_move_interrupted, joint_move_completion_timeout, joint_move_feedback_invalid, client_disconnected, plus the joint jog errors. If the HTTP client disconnects, OLP stops the move.