Draft: Add support for commits with no author

Currently stuck because this is high effort and low priority; I am only opening this diff so I don't lose this WIP code

Resolves #3880

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Migrated from D7603 (view on Phabricator)

Build has FAILED

Patch application report for D7603 (id=27538)

Rebasing onto 4281899e...

Current branch diff-target is up to date.

Changes applied before test

commit 8123c03673d22b28f18fcf88995e865182724b40
Author: Valentin Lorentz <vlorentz@softwareheritage.org>
Date:   Wed Apr 20 12:55:49 2022 +0200

    [WIP] Add support for commits with no author

Link to build: https://jenkins.softwareheritage.org/job/DLDG/job/tests-on-diff/186/ See console output for more information: https://jenkins.softwareheritage.org/job/DLDG/job/tests-on-diff/186/console

marked this merge request as draft

changed title from [WIP] Add support for commits with no author to Draft: Add support for commits with no author

changed milestone to %Improve support for malformed git commits [Roadmap - Technical debt]

Jenkins job DLDG/gitlab-builds #107 failed .
See Console Output and Coverage Report for more details.

added mr-reviewed-fall-2023 label