chore(changeset): patch for the plugin-sharing provenance comments

The re-anchored comments reach both halves of dist (measured after a build,
with a positive and a negative control), so the package ships changed bytes.

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

Author: claude

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

@@ -0,0 +1,10 @@
+---
+'@objectstack/plugin-sharing': patch
+---
+
+Provenance comments in `plugin-sharing` 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.