CDD-2432 Implement Middleware - Adds permission models

[mxrman]

Description

This PR includes the following:
Adds The following models to the data app.

• api_groups

• api_groups_permissions

• api_permissions

Also adds some organising of the existing api models: Moves the APITimeSeriesFactory model into a api_models package (including tests).

Fixes #CDD-2432

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Type of change

Please select the options that are relevant.

• 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 not work as expected)
• Tech debt item (this is focused solely on addressing any relevant technical debt)

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Checklist:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests at the right levels to prove my change is effective
• I have added screenshots or screen grabs where appropriate
• I have added docstrings in the correct style (google)

[sonarqubecloud]

Quality Gate failed

Failed conditions
D Reliability Rating on New Code (required ≥ A)

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