[bug] Upload to Amazon S3 and Backblaze fails on v0.5.0 and v0.4.2 (works only on v0.4.0)

**Description:** I tested multiple times uploading backups to Backblaze and Amazon S3 using versions v0.5.0 and v0.4.2, but the upload does not work. **Error message:** ``` failed to upload file to S3: operation error S3: PutObject, https response error StatusCode: 400, RequestID: SQGRTKWPTQ2VK8VD, HostID: xxeyY/LYgW8vu1opYMWJ8FQ4xu5n6B04Z60kFW6wlyE+7G7A6C3eyIowI/Zuis99fTeEbkFVJUw=, InvalidRequest: ``` <img width="868" height="318" alt="Image" src="https://github.com/user-attachments/assets/7149efcf-ac26-440c-bf44-50811431e441" /> **Notes:** - On v0.4.0 the upload works correctly. - It seems that the latest versions may require migrating to AWS SDK v2. - I could not test v0.3.0 because of the following error when running on arm64: `exec /usr/local/bin/task: exec format error` - I'm using the same credentials **Environment:** - Architecture: arm64 - k3s + traefik - Versions tested: v0.5.0, v0.4.2 (failed), v0.4.0 (works), v0.3.0 (cannot run)