Data upload duplicates/fails if user is switching studies

Data is sometimes duplicated, other times data upload fails with
```
The study deployment ID of one or more sequences in `batch` doesn't match `studyDeploymentId`
```

Probably the local database is not cleared/filtered when switching studies or uploading data

No file or test is named. Start by reproducing the problem while switching studies and uploading data, then trace local-database filtering and the upload path around the studyDeploymentId mismatch; done means uploads neither duplicate data nor fail after a study switch.

Written by the indexing model from the issue text.