Add asbestos exposure form

[miriam-z]

What is the change?

Added a new "Asbestos Exposure" question page to the lung cancer screening questionnaire flow. The page asks users if they have ever worked in a job where they might have been
exposed to asbestos.

Changes include:

• Added asbestos_exposure field to ResponseSet model with AsbestosExposureValues (Yes/No choices)
• Created AsbestosExposureForm with appropriate validation and error messages
• Created asbestos_exposure view with GET/POST handling
• Created asbestos_exposure.jinja template following NHS.UK design patterns, including:
• Collapsible details component explaining what asbestos is
• Information about industries and roles with potential exposure
• Examples of jobs at risk (heating engineers, demolition workers, plumbers, etc.)
• Updated questionnaire flow: ethnicity → asbestos_exposure → responses
• Updated responses summary page to display asbestos exposure answer
• Added comprehensive unit tests for both form and view
• Created and applied database migration 0016_responseset_asbestos_exposure

Why are we making this change?

Asbestos exposure is a significant risk factor for lung cancer. This question helps identify individuals who may have worked in occupations with potential asbestos exposure,
particularly in:

• Building and construction industries (especially 1950s-1990s)
• Roles involving work in old buildings

Capturing this information allows for:

• More accurate lung cancer risk assessment
• Better identification of high-risk individuals who may benefit from screening
• Compliance with clinical guidelines that consider occupational exposure history

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud