chore(changeset): re-declare @objectstack/rest as minor per the launch-window convention

The at-tier contract review's one finding: the #13476 family's changeset
(engine-unresolvable-fails-loud.md, PR #13910) ships the identical class
of public-door behaviour change as minor and names the convention; this
change goes strictly further (one refused -> served row), so patch was an
undeclared divergence. Declaration and convention now named in the body.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015YPiiDdw96RGS25WLctCQP

Author: claude

.changeset/objectql-provider-three-state.md

@@ -1,9 +1,16 @@
 ---
-"@objectstack/rest": patch
+"@objectstack/rest": minor
 ---
 
 fix(rest): the shipped `objectQLProvider` stops collapsing "the engine is wired and broke" into "no engine is wired" (#13904)
 
+Runtime behaviour change on a public REST door, shipped as `minor` under the
+repo's launch-window convention — the same convention the #13476 family's
+changeset (`engine-unresolvable-fails-loud.md`, PR #13910) and #13279's name
+for the identical class of change on this same door. This change additionally
+moves one row refused → served (a factory-registered engine now resolves and
+serves), so it sits strictly inside the class that convention governs.
+
 `rest-api-plugin.ts` handed `RestServer` an engine provider shaped
 `try { return ctx.getService('objectql'); } catch { return undefined; }`. The
 sync accessor throws for three distinguishable registry facts — never