Wrong config.data_browser_domain in some deployments

[hannes-ucsc]

$ _select 
lrwxr-xr-x@ 1 hannes  staff  3 May 20 11:26 .active -> dev
$ python -m azul config.data_browser_domain
2026-05-22 09:16:18,387    INFO MainThread __main__: Expression 'config.data_browser_domain' evaluated to 'dev.singlecell.gi.ucsc.edu'
dev.singlecell.gi.ucsc.edu

whereas

[dsotirho-ucsc]

Spike to review all deployments for the same type of issue.

[nadove-ucsc]

Deployment	sandbox	dev	prod	anvilbox	anvildev	hammerbox	anvilprod
Configured browser domain	dev.singlecell.gi.ucsc.edu	dev.singlecell.gi.ucsc.edu	data.humancellatlas.org	anvil.gi.ucsc.edu	anvil.gi.ucsc.edu	explore.anvilproject.org	explore.anvilproject.org
Actual browser domain	N/A	explore.dev.singlecell.gi.ucsc.edu	explore.data.humancellatlas.org	N/A	anvil.gi.ucsc.edu	N/A	explore.anvilproject.org

There is also data-browser.lungmap.net, which doesn't seem to appear anywhere in our environment.py files.

[achave11-ucsc]

@hannes-ucsc: "Assignee to file a fix for the two affected deployments (dev and prod)"