[CHORE] Exclude non-zero exit codes from final average / mean results

[ruyadorno]

📋 Description

Hyperfine does not automatically excludes non-zero exit codes from its final computed values, ref: sharkdp/hyperfine#591

We should tweak the process result scripts and chart generation to take that into account and manually exclude values from runs that have a non-zero exit code.

📂 Category

Code Refactoring - Improve code structure/quality

🎯 Motivation

More accurate results.

🎌 Scope of Work

• process results
• generate chart

📊 Impact Level

Medium - Noticeable improvements, minimal risk

⏰ Urgency

Medium - Should be done in next sprint