Add raw hobolink data as a rest API

[Note: Do this task in the `dev` branch]

The base output should be something like this:

```
return {
'time_returned': pd.to_datetime()
'data': df.to_dict(orient='records')
)
```

Just do a direct call to `get_live_hobolink_data` for now.

For parameters, we want `hours` to be a parameter; default value should be 24. I think that's probably it for now and I'm not sure what else we'd parametrize. (Maybe we can add Hobolink metadata as an optional thing that can be returned?

Notably, this API should be added to Swagger, and it should also have documentation associated with it. Look into this: https://swagger.io/docs/specification/about/ We are using the OpenAPI specification. It's a bit longwinded and you don't need to read all of it; you will best be served by looking at examples e.g. in the Flasgger README. https://github.com/flasgger/flasgger