fix: call ta processors using chain

[joseph-sentry]

we don't want to call the ta processors using a chord because we want to temporarily reduce the amount of lock contention in the database

this is a short term fix, we eventually want to move the test results writes to the finisher step, which will achieve the same effect as this fix

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.98%. Comparing base (7b243ab) to head (72291ff).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #966   +/-   ##
=======================================
  Coverage   97.98%   97.98%           
=======================================
  Files         443      443           
  Lines       35819    35820    +1     
=======================================
+ Hits        35096    35097    +1     
  Misses        723      723           

Flag	Coverage Δ
integration	42.16% <100.00%> (-0.01%)	⬇️
unit	90.63% <25.00%> (+<0.01%)	⬆️

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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[github-actions]

✅ All tests successful. No failed tests were found.

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[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: unsupported operand type(s) for |: '_chain' and 'list' app.tasks.upload.Upload View Issue

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