Lint more const string prototypes (#18922)

Content.Server/Traits/Assorted/NarcolepsySystem.cs

@@ -9,6 +9,7 @@ namespace Content.Server.Traits.Assorted;
 /// </summary>
 public sealed class NarcolepsySystem : EntitySystem
 {
+    [ValidatePrototypeId<StatusEffectPrototype>]
     private const string StatusEffectKey = "ForcedSleep"; // Same one used by N2O and other sleep chems.
 
     [Dependency] private readonly StatusEffectsSystem _statusEffects = default!;