Errors and warnings during improve process

[johnmhoran]

Working on WSL2 Ubuntu-20.04, I just ran ./manage.py import vulnerabilities.importers.github.GitHubAPIImporter and then ./manage.py improve --all. The improve process ran for approx. 1 hour 15 minutes and generated approx. 700 lines of warnings and errors, e.g.,

Inconsistent summary for <Vulnerability: VULCOID-XA>. Existing: High severity vulnerability that affects com.fasterxml.jackson.core:jackson-databind, provided: Deserialization of Untrusted Data in jackson-databind

and

Error while fetching 'https://repo1.maven.org/maven2/org/jenkins-ci/plugins/skype-notifier/maven-metadata.xml': 404