fix(*): apply the locomotion mask during in-game/eval inference, not just training

AIShipController (eval + real gameplay) ran the raw policy output unmasked
regardless of allow_vertical/allow_pitch_roll, while ShipAIController
(training) correctly discarded those axes for grounded curriculum stages.
A grounded-trained model's untrained vertical/pitch-roll output reached the
ship as noise during eval, understating it against models that were never
handicapped this way.

Game/scripts/ai_ship_controller.gd

@@ -17,6 +17,16 @@ extends ShipController
 # Uniform noise magnitude added to each action axis (0 = play at full skill).
 @export_range(0.0, 1.0) var action_noise: float = 0.0
 
+# Must mirror whatever the model was actually trained with (see
+# ShipAIController's identical exports on the training side, curriculum
+# stages 1-2 in TRAINING.md). A model trained grounded (mask on) never got a
+# reward gradient on these axes, so its raw output there is untrained noise —
+# leaving this true for such a model doesn't make it fly well, it just lets
+# that noise reach the ship instead of being discarded like it was in
+# training. Set false to match a grounded-trained model's actual behaviour.
+@export var allow_vertical := true
+@export var allow_pitch_roll := true
+
 var _policy: PolicyNetwork
 var _action := ShipAction.new()
 var _ticks_until_decision := 0
@@ -53,13 +63,13 @@ func _decide() -> void:
 	# gymnasium orders by SORTED key name — rotation xyz, thrust xyz, turbo
 	# (> 0 means on) — NOT ShipAction's thrust-first declaration order.
 	_action.rotation = Vector3(
-		_axis(out[0]),
+		_axis(out[0]) if allow_pitch_roll else 0.0,
 		_axis(out[1]),
-		_axis(out[2])
+		_axis(out[2]) if allow_pitch_roll else 0.0
 	)
 	_action.thrust = Vector3(
 		_axis(out[3]),
-		_axis(out[4]),
+		_axis(out[4]) if allow_vertical else 0.0,
 		_axis(out[5])
 	)
 	_action.turbo = out[6] > 0.0