dualsense: possibly fix weird vibrations

hosts/yarn/default.nix

@@ -16,6 +16,7 @@
     ./lact.nix
     ./vr.nix
     ./forza-trigger
+    ./dualsense-attenuation.nix
 
     inputs.impermanence.nixosModules.impermanence
   ];
@@ -173,4 +174,9 @@
 
   # PS5 DualSense adaptive triggers in Forza Horizon 4 / 5.
   services.forzaTrigger.enable = true;
+
+  # PS5 DualSense LRA whine fix: cap firmware-level haptic amplitude so the
+  # voice-coil actuators never hit their audible-buzz regime under heavy
+  # rumble. Independent of the forza-trigger adaptive trigger path.
+  services.dualsenseAttenuation.enable = true;
 }