Extended compare and run-remote tool #452
                
     Merged
            
            
          
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• Fixed massive variance blocking regression detection - Added proper variance-based validation that prevents false positives when latency data is too unstable for reliable analysis
• Fixed missing test links in performance summaries - Corrected regression counting logic so clickable Grafana links appear in bullet lists for confirmed regressions
• Added conditional AWS credentials checking - Credentials are only required when actually needed (for infrastructure deployment or S3 upload, not when using existing infrastructure with --inventory)
• Added automatic tool installation - Missing dependencies like redis-server, zip, and memtier_benchmark are automatically installed on remote nodes using official Redis APT repository
• Enhanced S3 upload error handling - Upload failures don't crash the process but continue with warnings, ensuring benchmark results are preserved locally even when S3 is unavailable