chore: remove juju/errors

[csuzhangxc]

No description provided.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fgksgf

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-01-27 03:33:40.762071592 +0000 UTC m=+1069648.376028438: ☑️ agreed by fgksgf.

[csuzhangxc]

/cherry-pick release-1.6

[ti-chi-bot]

@csuzhangxc: new pull request created to branch release-1.6: #6682.

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In response to this:

/cherry-pick release-1.6

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (release-1.x@d12040f). Learn more about missing BASE report.

Additional details and impacted files

@@              Coverage Diff               @@
##             release-1.x    #6681   +/-   ##
==============================================
  Coverage               ?   57.55%           
==============================================
  Files                  ?      264           
  Lines                  ?    38366           
  Branches               ?        0           
==============================================
  Hits                   ?    22083           
  Misses                 ?    14209           
  Partials               ?     2074           

Flag	Coverage Δ
unittest	57.55% <ø> (?)

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