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/PROJECT_META.md

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+# cpp_cache_indexer
+
+- stack: cpp
+- validator: cmake --build . && ctest
+- common_failure_modes: header/impl mismatch, parser edge cases
+
+## Scope
+
+Small representative project for training data generation.

example_projects/cpp_cache_indexer/TASKS.md

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+# Task Seeds: cpp_cache_indexer
+
+include/indexer.h, src/indexer.cpp
+
+## Validator
+
+`cmake --build . && ctest`

example_projects/cpp_cache_indexer/include/indexer.h

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+#pragma once
+#include <string>
+#include <vector>
+std::vector<std::string> tokenize(const std::string& line);

example_projects/cpp_cache_indexer/src/indexer.cpp

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+#include "indexer.h"
+#include <sstream>
+
+std::vector<std::string> tokenize(const std::string& line) {
+  std::istringstream in(line);
+  std::vector<std::string> out;
+  std::string tok;
+  while (in >> tok) out.push_back(tok);
+  return out;
+}