security hardening

[Andrew Kent (realark)]

• run dependency scanner daily
• add codeql for static analysis
• switch local dep checker tool to use gradle (and instruct agents to favor native tooling)

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[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-23T19:01:47.835973Z	ae35be8	Draft marked ready

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