Implement RC3 security audit framework and vulnerability tracking (#107)

* Initial plan

* Add comprehensive security audit framework and tests

Co-authored-by: Steake <530040+Steake@users.noreply.github.com>

* Complete security audit framework with documentation and vulnerability tracking

Co-authored-by: Steake <530040+Steake@users.noreply.github.com>

* Add security audit framework summary and complete documentation

Co-authored-by: Steake <530040+Steake@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Steake <530040+Steake@users.noreply.github.com>

Author: Copilot