get_record should take a default like get

Would make some code easier. For example

```
record = context.app.get_record(path)
if record is None:
total = 0
else:
total = record.get('total', 0)
return "votes is %s" % str(total)
```

becomes

```
return "votes is %s" % str( context.app.get_record(path, {}).get('total', 0))
```

Locate the get_record and get implementations and inspect how their arguments and missing values are handled. Add support for an optional default to get_record while preserving its current behavior when no default is supplied, then run the repository's existing tests if available to verify both cases.

Written by the indexing model from the issue text.