refactor(srp): remove managed frame planning hook

- derive fullscreen stage planning from pipeline render-graph support
- trim planning-only APIs from the managed SRP bridge and public surface
- update probes and tests to lock the slimmer SRP API boundary

engine/src/Rendering/Execution/RenderPipelineHost.cpp

@@ -45,7 +45,10 @@ void RenderPipelineHost::SetPipelineAsset(std::shared_ptr<const RenderPipelineAs
 std::vector<CameraFramePlan> RenderPipelineHost::BuildFramePlans(
     const std::vector<CameraRenderRequest>& requests) {
     return m_framePlanBuilder != nullptr
-        ? m_framePlanBuilder->BuildPlans(requests, GetPipelineAsset())
+        ? m_framePlanBuilder->BuildPlans(
+              requests,
+              GetPipelineAsset(),
+              GetPipeline())
         : std::vector<CameraFramePlan>();
 }