Seal/abstract/virtual everything (#6739)

Content.Server/Doors/Components/FirelockComponent.cs

@@ -13,7 +13,7 @@ namespace Content.Server.Doors.Components
     /// and not being openable on open-hand click.
     /// </summary>
     [RegisterComponent]
-    public class FirelockComponent : Component
+    public sealed class FirelockComponent : Component
     {
         [Dependency] private readonly IEntityManager _entMan = default!;
 

Content.Server/Doors/Components/ToggleDoorOnTriggerComponent.cs

@@ -3,7 +3,7 @@
 namespace Content.Server.Doors.Components
 {
     [RegisterComponent]
-    public class ToggleDoorOnTriggerComponent : Component
+    public sealed class ToggleDoorOnTriggerComponent : Component
     {
     }
 }