- Created comprehensive S3_CONFIGURATION.md documentation
- Covers AWS S3, MinIO, DigitalOcean Spaces, Cloudflare R2
- Documents optional AWS SDK dependency installation
- Includes configuration examples, troubleshooting, security best practices
- Added link to main DBAL README
- Explains why AWS SDK is optional and how to enable S3 support
Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>