v3.6.99

What's Changed

Documentation

• Add customization guide (reference/customization.md) explaining custom/, draft/, and contribution boundaries (#17434)
• Update drift warnings in deploy pipeline to point users to custom/scripts/
• Add customization routing step to /log-issue-aidevops command

Fixed

• Revert script preservation logic from PR #17421 — deployed scripts are a build artifact, not user-editable

Full Changelog: v3.6.98...v3.6.99