feat: node scores computation and storage

[jorgeantonio21]

No description provided.

[maschad]

Excellent work here @jorgeantonio21 this is some critical work 🚀 🥳 , and I am sure we may have to adjust this once it's integrated based on observations of the scores.

I've left some comments and suggestions.

I also think it would suit us to have some additional property-based tests for scoring functions e.g.

proptest! {
    #[test]
    fn test_gpu_vram_score_properties(
        free in vec(0i64..32_000_000_000i64, 1..4),
        total in vec(32_000_000_000i64..64_000_000_000i64, 1..4)
    ) {
        let score = compute_gpu_vram_utilization_score(&free, &total, 0.3);
        prop_assert!(score >= -1.0 && score <= 0.3);
    }

    #[test]
    fn test_gpu_temp_score_properties(temps in vec(20.0f64..100.0f64, 1..4)) {
        let score = compute_gpu_temp_score(&temps, 80.0, 100.0, 0.2);
        prop_assert!(score >= -1.0 && score <= 0.2);
    }
}

and also some integration tests for complete scoring pipeline e.g

#[tokio::test]
async fn test_performance_scoring_pipeline() -> Result<()> {
    let state = setup_test_db().await;
    let metrics = NodeMetrics {
        node_small_id: 1,
        cpu_usage: 0.5,
        ram_used: 8_000_000_000,
        ram_total: 16_000_000_000,
        gpu_memory_free: vec![8_000_000_000],
        gpu_memory_total: vec![16_000_000_000],
        gpu_percentage_time_execution: vec![0.3],
        gpu_temperatures: vec![70.0],
        gpu_power_usages: vec![180.0],
    };

    let performance = get_node_performance(&state, metrics).await?;
    
    // Test score components and correlations
    assert!(performance.total_performance_score >= 0.0 && performance.total_performance_score <= 1.0);
    
    // Test score changes with metrics changes
    let worse_metrics = NodeMetrics {
        cpu_usage: 0.9,
        ..metrics
    };
    let worse_performance = get_node_performance(&state, worse_metrics).await?;
    assert!(worse_performance.total_performance_score < performance.total_performance_score);

    Ok(())
}

Would love to hear your thoughts.

[maschad]

Amazing work @jorgeantonio21