Improve table processing reliability and screening parent inclusion

Table Processing Enhancements

• "No evidence" tags now correctly propagate to all row-level answers in fixed tables, giving you more consistent assessment states across table responses.
• Table responses that don't align with expected structure now automatically retry, reducing incomplete or malformed results.
• You can now provide template guidance for table questions via TableQuestion.template_guidance to improve response accuracy.

Screening Improvements

• Parent items are now automatically included when executing a screening, ensuring complete hierarchical context without manual configuration.

Data Model Cleanup

• Company cohorts functionality has been removed—companies are now associated directly with folders via company_id, simplifying the data model.