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* Initial plan * Add upgradeable contract implementation with UUPS pattern Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Add implementation and security summaries for upgradeable contracts Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Address code review feedback: fix storage gap naming and refactor V2 register Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Add completion summary document Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Address PR review feedback: fix array indexing, unsafe call, storage gap, and unused vars Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com>