Handler not configured when configuration set in django settings.py

When required configuration (specifically: `logs_ingest_key`) is set only in the Django `settings.py`, the handle will not be able to configure, raising 
```
ValueError: SCOUT_LOGS_INGEST_KEY is not set
```

This is possibly due to django/python attempting to setup the logging handlers before the setings.py configuration is loaded into the `scout_apm.core.config` module. 