Wire comparator CLI, marionette threading model, and final load order.

Initialize SmoThreadingModelDesc from marionette before body startup, load
comparator libs before stimbuff via -c/--comparator-lib, and drop the hardcoded
libcomparatorCore.so load path.

Co-authored-by: Cursor <cursoragent@cursor.com>

smocore/marionette/main.cpp

@@ -1,3 +1,4 @@
+#include <stdexcept>
 #include <config.h>
 #include <iostream>
 #include <opts.h>
@@ -22,6 +23,36 @@ std::shared_ptr<sscl::PuppeteerThread> thread = std::make_shared<
 
 MarionetteComponent mrntt(thread);
 
+stim_buff::SmoThreadingModelDesc smoThreadingModelDesc = {
+	.componentThread = nullptr
+};
+
+void initializeSmoThreadingModelDesc(
+	const std::shared_ptr<sscl::ComponentThread>& componentThread)
+{
+	if (!componentThread)
+	{
+		throw std::runtime_error(
+			std::string(__func__) + ": componentThread must be non-null");
+	}
+
+	if (smoThreadingModelDesc.componentThread
+		&& smoThreadingModelDesc.componentThread != componentThread)
+	{
+		throw std::runtime_error(
+			std::string(__func__)
+			+ ": SmoThreadingModelDesc already initialized with a different "
+			"ComponentThread");
+	}
+
+	smoThreadingModelDesc.componentThread = componentThread;
+}
+
+const stim_buff::SmoThreadingModelDesc& getSmoThreadingModelDesc()
+{
+	return smoThreadingModelDesc;
+}
+
 void marionetteInitializeReqCb(bool success)
 {
 	if (success)