Mark as beta: it is off in production

`stability` is what dashboard:doctor and the ship-dark contract read, and it said
"stable" for an app that is not running in production. That is worse than redundant —
it is doctor reporting the wrong thing about the deploy.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RDA3fQbsa3gaHCFoV1Q8Gg

composer.json

@@ -20,7 +20,7 @@
         },
         "dashboard": {
             "tier": "optional",
-            "stability": "stable",
+            "stability": "beta",
             "nav_folder": {
                 "label": "Help Desk",
                 "icon": "ticket",