refactor(srp): add renderer backend registry seam

managed/GameScripts/RenderPipelineApiProbe.cs

@@ -878,6 +878,20 @@ namespace Gameplay
         }
     }
 
+    internal sealed class ManagedBuiltinForwardAliasProbeRendererData
+        : ProbeRendererData
+    {
+        protected override ScriptableRenderer CreateProbeRenderer()
+        {
+            return new ManagedRenderPipelineProbe();
+        }
+
+        protected override string GetPipelineRendererAssetKey()
+        {
+            return "BuiltinForwardAlias";
+        }
+    }
+
     internal sealed class ManagedRendererReuseProbeRendererData
         : ProbeRendererData
     {
@@ -1235,6 +1249,18 @@ namespace Gameplay
         }
     }
 
+    public sealed class ManagedBuiltinForwardAliasRenderPipelineProbeAsset
+        : RendererBackedRenderPipelineAsset
+    {
+        public ManagedBuiltinForwardAliasRenderPipelineProbeAsset()
+        {
+            rendererDataList = new ScriptableRendererData[]
+            {
+                new ManagedBuiltinForwardAliasProbeRendererData()
+            };
+        }
+    }
+
     public sealed class ManagedUniversalRenderPipelineProbeAsset
         : UniversalRenderPipelineAsset
     {