chore(changeset): patch for the plugin-email provenance re-anchoring

The rewritten docblocks and inline comments ship: two anchors reach the
package's JavaScript entries and two its declaration files, so the change
publishes bytes and takes a patch changeset.

Claude-Session: https://claude.ai/code/session_01XY5uCwTjZj7884yYtyur4H
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

.changeset/20596-plugin-email-provenance-anchors.md

@@ -0,0 +1,10 @@
+---
+'@objectstack/plugin-email': patch
+---
+
+Provenance comments in `plugin-email` were re-anchored
+
+Comment and docblock lines under `src/` that cited tracker numbers which no
+longer resolve on GitHub now cite the commit in this repository's history that
+decided the matter, and say in their own words what was decided. Comments
+only: no type, schema, export, log or refusal text, or runtime behaviour changes.