fix(auth): ensure current_user is never None in BaseInteractor

[sentry]

This PR addresses an AttributeError: 'NoneType' object has no attribute 'is_authenticated' that occurred when TriggerSyncInteractor.validate() was called during staff impersonation.

Root Cause:
In BaseInteractor.__init__, when self.current_owner was present, self.current_user was directly assigned self.current_owner.user. If the impersonated owner did not have a linked Django User object, self.current_owner.user would be None, leading to self.current_user also being None. Subsequent calls to self.current_user.is_authenticated would then raise the AttributeError.

Fix:
Modified BaseInteractor.__init__ to ensure that self.current_user always defaults to Django's AnonymousUser() if self.current_owner.user is None. This aligns with Django's standard practice and guarantees that self.current_user is always an object with an is_authenticated attribute, preventing NoneType errors in interactors.

Legal Boilerplate

Look, I get it. The entity doing business as "Codecov" is owned by Harness, Inc. In 2026 Harness acquired Codecov and as a result Harness is going to need some rights from me in order to utilize my contributions in this PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Harness can use, modify, copy, and redistribute my contributions, under Harness's choice of terms.

Fixes API-EZD

_{This PR was automatically generated by Sentry. You can adjust this setting at any time.}

[thomasrockhu-codecov]

✨ Harness AI Code Review

View in Harness →

✅ Risk: LOW

This PR fixes an AttributeError: 'NoneType' object has no attribute 'is_authenticated' in BaseInteractor.__init__ by defaulting self.current_user to AnonymousUser() when an impersonated owner has no linked Django User. The change is a single defensive null-guard that mirrors the existing current_user or AnonymousUser() pattern already used a few lines above, and the description accurately matches the diff.

No issues found above the confidence threshold.

[codecov-notifications]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.63%. Comparing base (17e0f08) to head (1919b54).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2157   +/-   ##
=======================================
  Coverage   91.63%   91.63%           
=======================================
  Files        1337     1337           
  Lines       53262    53262           
  Branches     1647     1647           
=======================================
  Hits        48805    48805           
  Misses       4136     4136           
  Partials      321      321           

Flag	Coverage Δ
apiunit	93.98% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.