Stub: Create a step to Hash Content in a workflow

[olyveya]

Goal: Create a step in a in a workflow to hash content - to avoid duplicate records.

Description:
Create a python script step in a workflow to hash each chunk of text/content before it is converted into a node and sent to the graph.

Requirements:

Check that all content sent to the knowledge graph is hashed using a hash function prior to node creation.

If a hash already exists, content is not added to the graph (ends workflow).

Open Question:
How to pull and retrieve existing content in the graph to compare hash outputs (strings of hash) so that we don't create a duplicate record in our graph?

Do we store old content for version control?
if hash is the same between old content and new - then create an edge between "new_use" and "old_paragraph"