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Public-repo hygiene, no functional change to the engine:
- Removed copyrighted/celebrity voice references and pre-rebrand (J.A.R.V.I.S./Stark) branding from docs and examples; git history rewritten to purge them.
- Fixed the CI lint job (ruff): moved error-handler imports to the top, dropped redundant aliases, split multi-import/statement lines.
Same standalone engine as the previous release.