OpenAPI: Add blocking indexing thread pool option

common/IndexingSettings.cpp

@@ -200,3 +200,12 @@ float IndexingSettings::GetRotationIndexingAngularStride_deg() const {
 bool IndexingSettings::GetIndexIceRings() const {
     return index_ice_rings;
 }
+
+bool IndexingSettings::GetBlockingBehavior() const {
+    return blocking_behavior;
+}
+
+IndexingSettings &IndexingSettings::BlockingBehavior(bool input) {
+    blocking_behavior = input;
+    return *this;
+}