chore: add an empty changeset for the test-only drift guard

The Check Changeset gate requires a changeset on every PR and sanctions an
empty one for changes that release nothing. This PR adds a test and ships no
package change, so it takes that path — matching the existing docs/assessment
changesets that carry empty frontmatter.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TubWYdWquVkS9dj733sDmC

Author: claude

.changeset/plugin-page-i18n-drift-guard.md

@@ -0,0 +1,14 @@
+---
+---
+
+test(cli): pin the plugin-carried Setup pages against their translations (#3589)
+
+Test-only; releases nothing. Adds a drift guard asserting the `en` entries in
+`@objectstack/platform-objects` stay byte-identical to the `page:header`
+literals authored in `@objectstack/cloud-connection` and `@objectstack/mcp`,
+that the `pages` key set matches across every shipped locale, and that
+`translatePage` localizes the three Setup pages end-to-end.
+
+`translatePage` applies the bundle for every locale including `en`, so a
+drifted `en` entry silently overrides newer authored copy rather than falling
+back to it — previously nothing in the build caught that.