chore: publish v0.4.2 — fix workspace deps, remove publish.sh

- workspace:* → workspace:^ (resolves to ^x.y.z instead of exact)
- Remove publish.sh, use changesets workflow
- changeset config: access public (Gitea compat)
- release script: build + test + changeset publish

packages/workflow-protocol/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uncaged/workflow-protocol",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "files": [
     "dist",
     "package.json"