BE006 optimise recommendation engine performance

[Diya223287452]

Ticket

• BE006 – Optimise Recommendation Engine Performance

Description

This PR improves the performance of the recommendation engine by reducing repeated processing and making the pipeline more efficient.

Changes made:

• Added caching to avoid repeating the same computation
• Added a limit to the cache to prevent memory issues
• Simplified cache key for better performance
• Moved repeated diet constants to a single place for cleaner code

Validation

• First run processes normally (servedFromCache: false)
• Second run uses cache (servedFromCache: true)

Checks

• All requirements of the ticket have been implemented
• Unit tests added (if applicable)
• Files Changed tab reviewed
• PR reviewed and approved

Screenshots

• First run showing no cache (servedFromCache: false)
• Second run showing cache usage (servedFromCache: true)
• Git commit showing BE006 changes

screenshots: