Integrate Refactor solver sources and dual MSVC CMake builds

include/fesa/model/source_target_resolver.h

@@ -38,6 +38,14 @@ class SourceTargetIndex {
   /// @return An owning index that preserves Domain declaration order.
   static SourceTargetIndex FromDomain(const Domain& domain);
 
+  /// @brief Copies node and set identities before Domain ownership begins.
+  /// @param nodes Semantic nodes in stable expanded declaration order.
+  /// @param node_sets Node memberships in stable source order.
+  /// @return An owning node-only index preserving raw spelling and scope.
+  /// @note The returned index outlives its inputs; no Domain is constructed.
+  static SourceTargetIndex FromNodeDefinitions(
+      const std::vector<Node>& nodes, const std::vector<NodeSet>& node_sets);
+
   /// @brief Returns owned entries without exposing mutable index state.
   const std::vector<SourceTargetIndexEntry>& Entries() const noexcept;