Large File Browser Direct Upload: Multipart Presigned Parts and Retention

Chronological Source Flow
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AI Fusion Summary

Large browser file uploads should use multipart presigned URLs with a server‑side state machine to manage retention, deletion, and completion. By recording upload intent before issuing short‑lived URLs, the application can keep an auditable, tenant‑scoped export while avoiding data loss from flaky connections. This approach separates object storage from application logic, ensuring reliable retry and proper data lifecycle control.
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