fix(mobile): add owner field to app.json to match EAS project owner

EAS was failing because the projectId belongs to 'christian-krakau-louis'
but the 'owner' field was not set, causing a mismatch with the logged-in
user. Adding 'owner': 'christian-krakau-louis' resolves the error.

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

mobile/app.json

@@ -62,6 +62,7 @@
     "expo-secure-store"
   ],
   "scheme": "docuelevate",
+  "owner": "christian-krakau-louis",
   "extra": {
     "eas": {
       "projectId": "8455f39d-ef0d-4850-98e4-f79e388642c1"