Init property map if nil on ingest node

[definitelynotagoblin]

Description

Initialize property map on node ingest if undefined in JSON input file.

Motivation and Context

https://specterops.atlassian.net/browse/BED-4076
This error occurs because we assume that the field "Properties" is defined on the ingest object.
We should either initialize it if it does not exist on processing or otherwise raise an error.

How Has This Been Tested?

Ingest run on data files containing both populated and null "Properties" fields.

Screenshots (if appropriate):

Types of changes

• Chore (a change that does not modify the application functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Documentation updates are needed, and have been made accordingly.
• I have added and/or updated tests to cover my changes.
• All new and existing tests passed.
• My changes include a database migration.