Bandit errors are masked as problems uploading the SARIF file

[akkornel]

Describe the bug
If Bandit encounters an error, it still tries uploading a SARIF file, which fails. This masks the true cause of an error: When the failure logs are examined, it looks like the error was with the SARIF upload, when the error was actually with Bandit.

To Reproduce
Steps to reproduce the behavior:

1. Create a GitHub Actions Workflow that uses this Action, but specifies something that causes an error. In my case, I specified the configfile option, pointing to my pyproject.toml file.
2. Let the GitHub Actions Workflow run normally.

Bandit will fail, because it does not have the toml extra installed. But when I look at the Workflow results, GitHub tells me that the run failed because of the error Error: Invalid SARIF. JSON syntax error: Unexpected end of JSON input. I can only see the true cause of the error by digging in to the logs of the run.

Expected behavior
I expected the Action to fail with the error [main] ERROR pyproject.toml : toml parser not available, reinstall with toml extra. I never expected the Action to try to upload a SARIF file.

Screenshots
I don't have screenshots, but you can check out https://github.com/stanford-rc/mais-apis-python/actions/runs/16611405604/job/46995066343 for an example of a run where this happened.

Desktop (please complete the following information):
n/a

Smartphone (please complete the following information):
n/a

Additional context
None