Fix deprecation warning for unknown AR attribute
Fix deprecation warning for unknown AR attribute

```
DEPRECATION WARNING: case_transferred_from_another_court is not an
attribute known to Active Record. This behavior is deprecated and will
be removed in the next version of Rails. If you'd like case_trans
ferred_from_another_court to be managed by Active Record, add `attribute
:case_transferred_from_another_court to your class.
```

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