feat: Add cloud storage integration with S3 upload/download and snapshot management

[tobidae-cb]

🚀 Core Features Added:

1. AWS S3 Cloud Storage Integration

   • Added S3 service for uploading and downloading benchmark results
   • New export-to-cloud command to upload entire output directories to S3
   • S3 integration in the main benchmark runner with --enable-s3 flag
   • Automatic result upload during benchmark execution when S3 is enabled

2. Import/Export System for Benchmark Results

   • New import-runs command to import benchmark results from local files or remote URLs
   • Support for merging metadata from different benchmark runs

3. Enhanced Snapshot Management System

   • Optimized two-tier snapshot system for better performance
   • Initial snapshots downloaded once and reused across tests
   • Per-test snapshot copies using optimized rsync strategies
   • Remote snapshot source support for cloud-based initial snapshots

4. Machine Information Collection

   • Added machine metadata collection (type, provider, region, filesystem)
   • Machine info included in benchmark results for better context

5. Report Backend API Improvements

   • New Go-based REST API backend for serving benchmark data from S3

6. Frontend Enhancements

   • Updated React frontend to work with new backend API
   • Support for displaying machine information in reports
   • Integration with cloud-stored benchmark results

🔧 Technical Improvements:

• Optimized rsync strategies for faster snapshot copying
• Better error handling and logging throughout the system
• Structured configuration management for import/export operations
• TTL-based caching for improved performance
• Docker support for containerized deployment

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1