Add metrics tracking to ClockRing, ARC, CAR, and ClockPro pol…

[TKorr]

…icies

• Introduced metrics for tracking cache operations, including hand advances, reference bit resets, and eviction counts in ClockRing.
• Enhanced ARC, CAR, and ClockPro policies with metrics for get calls, hits, misses, and evictions, improving observability of cache behavior.
• Implemented snapshot structures for metrics, allowing for easy retrieval and reporting of performance data.
• Updated documentation to include new metrics features and usage examples, ensuring clarity on how to leverage metrics for performance monitoring.
• Ensured all changes align with performance goals, maintaining efficient memory usage and O(1) complexity for critical operations.

Description

Related Issue

Fixes #

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📝 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧪 Test addition or modification

How Has This Been Tested?

• Unit tests
• Integration tests
• Manual testing

Test environment:

• OS:
• Rust version:

Checklist

• My code follows the project's coding standards
• I have run cargo fmt and cargo clippy
• I have added tests for my changes
• All new and existing tests pass (cargo test)
• I have updated the documentation as needed
• I have added an entry to CHANGELOG.md (if applicable)

Screenshots (if applicable)

Additional Notes