SharedResourceGroup: add move constructor for initial resource.

Allows move-only ResourceType values (e.g. containers of unique_ptr) to initialize rsrc without copying.

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

include/spinscale/sharedResourceGroup.h

@@ -2,6 +2,7 @@
 #define SHARED_RESOURCE_GROUP_H
 
 #include <string>
+#include <utility>
 
 namespace sscl {
 
@@ -20,6 +21,11 @@ public:
 	: lock(lockName), rsrc(initialRsrc)
 	{}
 
+	SharedResourceGroup(
+		const std::string& lockName, ResourceType&& initialRsrc)
+	: lock(lockName), rsrc(std::move(initialRsrc))
+	{}
+
 	~SharedResourceGroup() = default;
 
 	LockType lock;