WIP: stage all uncommitted work — sprints 46-221, graduation headers, specialist fleet, test steps 909-1988

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

example_projects/cpp_cache_indexer/include/indexer.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <string>
+#include <vector>
+std::vector<std::string> tokenize(const std::string& line);