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aef254ca0d
Replace the recursive template metaprogramming implementation of StaticallyIndexedArray with a simple C-array based struct. This avoids deep template instantiation while maintaining the same interface. Key changes: - StaticallyIndexedArray now stores `T data_[N]` instead of inheriting from Tuple - Added constexpr conversion constructor to convert from any indexed container (Tuple, etc.) - Added arithmetic operators (+, -, *, +=, -=) using C++20 concepts - Added overloads for container_reorder_given_new2old/old2new - Added overloads for get_container_subset and set_container_subset - Specialization for empty array (N=0) Co-Authored-By: Claude <noreply@anthropic.com>