Add ComparatorApiManager with SmoCallbacks hooks and startup load.

Register comparator types via a dedicated manager and expose lookup/create
hooks through SmoCallbacks so stimbuff libs can resolve comparators at load time.

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

include/user/senseApiDesc.h

@@ -8,6 +8,7 @@
 #include <memory>
 #include <vector>
 #include <preprocessor.h>
+#include <user/comparatorApiDesc.h>
 #include <user/deviceAttachmentSpec.h>
 #include <spinscale/co/dynamicPostingInvoker.h>
 #include <spinscale/co/invokers.h>
@@ -137,8 +138,18 @@ struct SmoCallbacks
      */
     void (*ComputeManager_releaseDevice)(
 		std::shared_ptr<smo::compute::ComputeDevice> device);
+
+    std::shared_ptr<cologex::ExportedComparatorTypeDesc>
+	(*ComparatorManager_getComparatorType)(
+		cologex::ComparatorTypeId typeId);
+
+    std::unique_ptr<cologex::Comparator> (*Comparator_getNewInstance)(
+		const std::shared_ptr<cologex::ExportedComparatorTypeDesc>&
+			comparatorType);
 };
 
+const SmoCallbacks& getSmoCallbacks();
+
 struct Sal_Mgmt_LibOps
 {
     /* When Salmanoff loads a stim buff API lib, it calls this function to initialize