fix(media-files): Skip sync when draft files doesn't have a bucket

[sakshamarora1]

• When publishing an edit, _publish_edit always calls bucket.sync(), however the method assumes that the draft files manager has a bucket already initialized but if the media files flag is disabled and no files were ever uploaded to the draft, the bucket is not created and the sync errors out.

Note

• The problem only became visible on python3.14 and only on the CI runs, I was not able to figure out why exactly.
• I checked the dependencies differences between 3.9/3.11 version and 3.14 and they were 2-3 unrelated small packages
• I also checked the dependency changes between when 3.14 passed 2 weeks ago vs failing now and these are the changes in versions:

certifi 2026.1.4 -> 2026.2.25
SQLAlchemy 2.0.46 -> 2.0.48
redis 7.2.0 -> 7.3.0
maxminddb 3.0.0 -> 3.1.1
invenio-db 2.2.1 -> 2.3.0
invenio-administration 5.0.0 -> 5.1.0
invenio-stats 6.1.0 -> 6.1.2
ua-parser-builtins 202602 -> 202603
wrapt 2.1.1 -> 2.1.2
platformdirs 4.9.2 -> 4.9.4
isort 8.0.0 -> 8.0.1
black 26.1.0 -> 26.3.0
ipython 9.10.0 -> 9.11.0
imagesize 1.4.1 -> 2.0.0
charset-normalizer 3.4.4 -> 3.4.5
pytest-github-actions-annotate-failures 0.3.0 -> 0.4.0

• When I run locally the test suite then everything passes (but if it fails for someone else, please mention here to have more context!)

[ptamarit]

Can this bug be covered be covered by a test?

[sakshamarora1]

The test_multiple_edit test function is is covering this. It has media files disabled. it's the test that was failing before.