Fix leftover tasks when aborting an exposure

[albireox]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 87.17949% with 5 lines in your changes missing coverage. Please review.

Project coverage is 87.7%. Comparing base (82f6800) to head (7bda48d).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
archon/actor/delegate.py	83.9%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #51     +/-   ##
=======================================
+ Coverage   87.7%   87.7%   +0.1%     
=======================================
  Files         23      23             
  Lines       2194    2199      +5     
  Branches     372     370      -2     
=======================================
+ Hits        1922    1927      +5     
  Misses       176     176             
  Partials      96      96             

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