Sprint 3 complete: Phases 3g+3h (Steps 68-75), all 75 steps done

Phase 3g — Optimization Pipeline (17/17 tests):
  Step 68: TransformEngine — constant folding, dead code elimination, OptimizationLock warning
  Step 69: StrategyAwareOptimizer — annotation-constrained (@Reclaim allows, @Owner blocks duplication, @Deallocate blocks reorder, @Allocate blocks dynamic)
  Step 70: StrategyValidator — post-optimization invariants (use-after-free, leak, aliasing)
  Step 71: IncrementalOptimizer — transform journal, undo by ID, provenance tracking

Phase 3h — Integration & Validation (26/26 tests):
  Step 72: Pipeline — end-to-end parse→infer→validate→optimize→generate for Python/C++
  Step 73: Error handling — empty ASTs, null roots, nonexistent IDs, unannotated code
  Step 74: Performance benchmarks — 1000-fn AST 1ms, JSON round-trip 4ms, 50 transforms+undo 1ms
  Step 75: APIDocGenerator — structured docs for 23 components across 6 categories

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

editor/tests/step71_test.cpp

@@ -20,32 +20,7 @@
 #include "ast/Statement.h"
 #include "ast/Expression.h"
 
-// Forward declaration — IncrementalOptimizer
-class IncrementalOptimizer {
-public:
-    struct TransformRecord {
-        std::string transformId;
-        std::string transformName;  // e.g., "constant-fold", "dead-code-elim"
-        std::vector<std::string> affectedNodeIds;
-    };
-
-    void setRoot(ASTNode* root);
-
-    // Apply a named transform, returns its ID
-    std::string applyTransform(const std::string& transformName);
-
-    // Get all applied transforms in order
-    std::vector<TransformRecord> getTransformHistory() const;
-
-    // Undo a specific transform by ID
-    bool undoTransform(const std::string& transformId);
-
-    // Undo the most recent transform
-    bool undoLast();
-
-    // Get which transform created/modified a given node
-    std::string getProvenance(const std::string& nodeId) const;
-};
+#include "IncrementalOptimizer.h"
 
 int main() {
     int passed = 0;