[Advanced] Implement A/B testing for configurations

[iAziz786]

Description

Test on agent subsets

Acceptance Criteria

• Support configuration A/B testing
• Implement agent cohort management
• Add experiment result collection
• Support gradual configuration rollouts
• Implement statistical significance testing

Implementation Hints

• Use agent attributes for cohort assignment
• Implement experiment tracking
• Add result aggregation and analysis

Dependencies

Configuration profiles, Metrics collection