fix: align context.tf files across multiple modules for consistency and fix 'enabled' function

[nhs-oliverslater]

Description

Align context.tf files across multiple modules to ensure consistency in variable definitions and module configurations.

Context

This change standardizes the structure and descriptions within context.tf files, improving maintainability and clarity across modules.

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.