Codex updates for XML and HtmlExtract Nodes

Editor assessment

The subject says codex metadata files were updated for the XML and HtmlExtract nodes, which names the affected nodes precisely but relies on the house term codex and never says what the updates contained: new parameters, corrected descriptions, version bumps. Understandable with repo context, opaque without it. The refactor type is plausible for metadata maintenance, and no scope is given beyond the node names embedded in the subject. No body exists, which is where the missing substance belonged. The PR reference is well formed. Understandable with effort, thin everywhere else: mediocre rather than good.