Import Batch Uploaded At

The uploadedAt timestamp on an ImportBatch marks the moment the lab file entered Piper's system. It is distinct from parsedAt and committedAt, which track later stages of the ImportBatch lifecycle. For audit purposes, uploadedAt documents that lab data was received within the required reporting window — important when permit conditions specify how quickly monitoring results must be entered after the lab delivers them. It also helps staff sort and filter the import history by date of receipt.