chore(release): regenerate api/openapi.json for 0.4.1

The OpenAPI `info.version` tracks the crate version, so the 0.4.1 bump (4563a04)
left api/openapi.json stale at 0.3.0 and reddened
`mgmt::tests::openapi_document_is_complete_and_checked_in`. The API surface is
unchanged since v0.4.0, so this is the version string only.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

api/openapi.json

@@ -10,7 +10,7 @@
       "name": "MIT OR Apache-2.0",
       "identifier": "MIT OR Apache-2.0"
     },
-    "version": "0.3.0"
+    "version": "0.4.1"
   },
   "paths": {
     "/api/v1/clients": {