chore(changeset): add changeset for rest export route fix

Author: baozhoutao

.changeset/rest-export-route-before-getbyid.md

@@ -0,0 +1,16 @@
+---
+"@objectstack/rest": patch
+---
+
+fix(rest): register static data-action routes before the greedy `:object/:id` matcher
+
+The REST router matches first-registered-wins with no specificity sorting, but
+`registerDataActionEndpoints` (which holds `GET /data/:object/export`) ran AFTER
+`registerCrudEndpoints` (which holds the greedy `GET /data/:object/:id`). A
+request to `GET /data/<object>/export` was therefore captured by `:object/:id` —
+`"export"` treated as a record id — returning `404 RECORD_NOT_FOUND` instead of
+streaming the export. The data-action registration now runs first, mirroring the
+existing `/meta/:type/:name/references`-before-`/meta/:type/:name` convention.
+Reordering is safe both ways: `registerDataActionEndpoints` contains no greedy
+2-segment `:object/:id` routes, so it cannot shadow any CRUD literal. A
+regression test asserts the export route registers ahead of the get-by-id route.