perf/PSD-3232-SCPN-product_controler_refactoring

[mirotriad]

Optimize Performance of Product Controller's Show and Update Methods

Summary

This PR improves the performance of the ResponsiblePersons::Notifications::ProductController by optimizing database queries in both show and update methods. The changes reduce unnecessary database loads and minimize query count while maintaining existing functionality.

Key Changes

Show Method Optimization

• Reduced query count from 4+ to 1-3 queries for the completed step
• Implemented selective association loading based on the current step
• Added performance test to ensure query count stays within acceptable limits

Update Method Optimization

• Reduced query count from 4+ to 2 queries for simple updates
• Added direct column updates using update_column for simple attribute changes:
  • product_name updates
  • under_three_years updates
• Implemented selective association loading in set_notification_and_authorize:
  • Only loads nano_materials and components for steps that need them
  • Only loads components for the single_or_multi_component step
  • No association loading for simple updates

Code Organization

• Improved code maintainability by organizing related operations
• Added database transactions for atomic operations
• Added performance tests to prevent query count regression

Performance Improvements

• Simple updates (e.g., product name changes): Reduced from 4+ to 2 queries
• Show method completed step: Reduced to maximum 3 queries
• Eliminated unnecessary association loading for steps that don't need them

Testing

• Added performance-specific tests to monitor query count
• All existing functionality tests remain passing
• New tests ensure query counts stay within expected limits

Notes

• No changes to existing business logic or validation rules
• Maintains all security checks and authorization flows
• Backwards compatible with existing API contracts