Implement asynchronous file upload and download using S3AsyncClient

[faizakram]

This pull request adds asynchronous file handling capabilities using S3AsyncClient to enhance the performance and responsiveness of interactions with AWS S3. The following features have been implemented:

1. Asynchronous File Upload to S3:

   • Utilizes S3AsyncClient to perform non-blocking file uploads to an S3 bucket.
   • Supports optional public access configuration (public-read) during upload.
   • Implements error handling and logging to monitor upload success or failure.

2. Asynchronous File Download from S3:

   • Implements file download functionality using S3AsyncClient to stream files asynchronously from an S3 bucket.
   • Ensures efficient memory usage by streaming data directly to the client in a non-blocking manner.
   • Provides a REST endpoint to initiate downloads by file key.

Why Use S3AsyncClient:

• Improved Performance: S3AsyncClient enables non-blocking operations, allowing the application to handle multiple requests concurrently without waiting for each operation to complete. This improves throughput and responsiveness, especially in high-traffic environments.
• Scalability: Asynchronous operations are more scalable because they efficiently utilize resources by freeing up threads for other tasks while waiting for I/O operations to complete.
• Better User Experience: The non-blocking nature of S3AsyncClient reduces latency, providing a faster and more responsive experience for end users, especially when handling large files or multiple simultaneous requests.
• Optimized Resource Utilization: Asynchronous handling minimizes the memory footprint and reduces CPU usage by efficiently managing I/O-bound tasks, leading to overall better resource management.

By leveraging S3AsyncClient, these changes enhance the application's capability to manage file operations with AWS S3, making it more efficient, scalable, and suitable for high-performance use cases.