Copilot/fix failing workflows and dependencies (#207)

* Initial plan

* fix: consolidated workflows + deps + security + SHA pins

Agent-Logs-Url: https://github.com/DavidKRK/DavidKRK.github.io/sessions/7ce31d8d-af7f-4fdd-b453-4a6a08f90e49

Co-authored-by: DavidKRK <136035295+DavidKRK@users.noreply.github.com>

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

Author: DavidKRK