ingesting an already ingested file leads never ending logs

[MalinAhlberg]

Describe the bug
Starting ingestion of a file that is already ingested leads no never ending logs, but no error message or warning fr omsda-admin.

Steps to reproduce
Using the setup described here (but with new versions of the code), run
./sda-admin file ingest --filepath requester_demo.org/data/file1.c4gh --user [email protected] twice.
Run docker compose -f .github/integration/sda-s3-integration.yml logs -f to see the logs being filled with for example:

postgres  | 2024-09-12 13:36:22.248 UTC [80] ERROR:  duplicate key value violates unique constraint "unique_checksum"
...
verify    | {"level":"error","msg":"SetVerified failed, reason: (pq: duplicate key value violates unique constraint \"unique_checksum\")","time":"2024-09-12T13:36:22Z"}

Expected behavior

• ...

Additional context
From #1026. See also #1027.

Estimation of size: medium

Estimation of priority: medium