Format does not return on the REST API when querying a view

**Describe the bug**
If you add the `format` field to a metric on a cube and then include that metric in a view, the format field is not returned in the API /meta or /query response for the view. Format is included in for the metric on the cube - just not the view.

**To Reproduce**
Steps to reproduce the behaviour:
1) Create a cube with one or more metrics
2) Add `format: currency` or `format: percent` to the metrics
3) Create a view that includes the metrics in 1)
4) Make a request to the /meta or /query endpoints on the REST API.
5) You will see the format field is returned for the cube but not the view.

**Expected behaviour**
I would expect the format field to be included in the `annotations` object of the /query response if I query the view. Otherwise, it is not possible to apply the format on the client.

**Additional context**
Both description and meta fields are carried through to the view response from the underlying cube.