Evaluation: Refactoring CRON

[AkhileshNegi]

Is your feature request related to a problem?

The evaluation cron job currently loops through each organization to check for in_progress evaluations. While this ensures all organizations are covered, the evaluation table is small enough that we could take a simpler approach.

Describe the solution you'd like

Optimize the evaluation cron job:

• Query all in_progress evaluations directly instead of looping per organization
• Add index on status column to speed up the query