Parley Model Refactor

[bbengfort]

Scope of changes

Refactors the parley models to represent the latest evaluation criteria and adds user evaluations.

Type of change

• bug fix
• new feature
• documentation
• other (describe)

Acceptance criteria

This PR will be merged without review.

Author checklist

• I have manually tested the change and/or added automation in the form of unit tests or integration tests
• I have updated the dependencies list
• I have added new test fixtures as needed to support added tests
• I have added or updated the documentation

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ImproperlyConfigured: The included URLconf '2' does not appear to have any patterns in it. If you see the 'urlpatterns'... / View Issue
• ‼️ SyntaxError: invalid syntax (user.py, line 77) parley.models in <module> View Issue
• ‼️ AttributeError: 'Evaluation' object has no attribute 'evaluation' / View Issue
• ‼️ AttributeError: 'Evaluation' object has no attribute 'evaluation' /reviews/{pk} View Issue
• ‼️ IndentationError: expected an indented block after 'if' statement on line 464 (llm.py, line 466) parley.models in <module> View Issue

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