BF: check for upload to not have our .dandidownload suffixes

[yarikoptic]

Largely was done by claude, yet to be tuned

Fixes #1594

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.82%. Comparing base (714d88c) to head (28c69d7).
⚠️ Report is 113 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1645      +/-   ##
==========================================
+ Coverage   88.70%   88.82%   +0.11%     
==========================================
  Files          84       84              
  Lines       11646    11689      +43     
==========================================
+ Hits        10331    10383      +52     
+ Misses       1315     1306       -9     

Flag	Coverage Δ
unittests	88.82% <100.00%> (+0.11%)	⬆️

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[yarikoptic]

I think this one is ready too, @CodyCBakerPhD please have a look ;-)

[CodyCBakerPhD]

Code changes are minimal, tests LGTM

@yarikoptic Planning to do anything about those bad uploads currently on the bucket? Or just wait till GC finds them

[yarikoptic]

might be indeed a good idea to identify and report them all. The easiest would be just to go through zarr manifests on typhon (trying to figure out some nasty git push issue forbidding placing them online). Running now (

yoh@typhon:~/proj/dandi/zarr-manifests$ duct grep -R '\.dandidownload' . 
2025-08-25T17:41:58-0400 [INFO    ] con-duct: duct is executing 'grep -R \\.dandidownload .'...
2025-08-25T17:41:58-0400 [INFO    ] con-duct: Log files will be written to .duct/logs/2025.08.25T17.41.58-1294427_

[github-actions]

🚀 PR was released in 0.71.2 🚀