Claudex v1.5.3

Added

• Added code ownership, maintainer and roadmap documentation, a dedicated
  documentation issue form, component-aware pull-request labeling, Dependabot,
  dependency review, and CodeQL scanning for a clearer and safer contributor
  workflow.
• Added public triage targets, label guidance, contribution discovery links,
  responsible AI-assisted contribution expectations, security response targets,
  and a good-faith research safe-harbor policy.

Changed

• Expanded repository governance, support expectations, contributor recognition,
  and maintainer release policy while keeping the project lightweight and
  volunteer-friendly.

Security

• Replaced ambiguous YAML plain-scalar comment stripping with bounded linear
  parsing so a large imported skill cannot stall startup with polynomial regex
  backtracking.