Seed data: Add articles to users

[MarchandMD]

Description

A clear and concise description of the issue.

Now that Users can have Articles, I want to populate the Users with mock articles in the seed file

User Story

As a engineer
I want to add articles to users in the seed file
So that I have a working state of the application with articles for each user

Engineering Checklist

• add article seed data to the seed file
• seed the database with the new data

Acceptance Criteria

• add article seed data to the seed file
• seed the database with the new data

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Additional Context

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