M12e: contract pass (pair invite kind, admin name in invite links, sync failed flag, rejection actor, device version name, template id, update check result, untouched accounts, D-027 re-stamp, PushEvent in :core:model, snackbar hosts)

Server: E-3 invite_kind; E-12 link ?from=<admin name>, E-4 passes it into kvitt://invite;
X-Kvitt-App-Version-Name stored in devices.app_version_name (migration 0003, schema 3);
OpenAPI and examples follow. Phone: :core:model, :core:fakes, :data, features and :app
updated together; goldens re-recorded for S-20 (version name) and new S-1/S-22 states.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

contracts/examples/E-3-invites-accept/response.json

@@ -1,5 +1,6 @@
 {
   "token": "kvt_q7Zm0yHc1u2R9vXgB4kLw8sTn3eP6aJdF5oQ1iYbV0c",
+  "invite_kind": "admin_setup",
   "user": {
     "id": "0192a000-0000-7000-8000-000000000001",
     "role": "admin",
@@ -14,6 +15,7 @@
     "user_id": "0192a000-0000-7000-8000-000000000001",
     "name": "Galaxy S26",
     "app_version_code": 41,
+    "app_version_name": "1.1",
     "created_at": "2026-10-17T06:12:40.512Z",
     "last_seen_at": "2026-10-17T09:00:00.000Z",
     "revoked_at": null,