test: fix flaky interrupt test in OperationsTest

[a-oren]

Description

Describe what you did and why.

Related issue (if any): fixes #issue_number_goes_here

Checklist

• I have followed this repository's contributing guidelines.
• I will adhere to the project's code of conduct.

Additional information

Anything else?

Summary by Sourcery

Bug Fixes:

• Stabilize the interrupted output collection test by ensuring the subprocess remains active when interruption is exercised.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

The flaky interrupt test now invokes a long-running foreground process, making interruption behavior deterministic and avoiding races caused by the previous background-process command exiting immediately.

File-Level Changes

Change	Details	Files
Make the interrupt test exercise a consistently running child process instead of a command that exits immediately while leaving a background process.	Replace the shell command with a long-running sleep. Preserve the existing interruption and interrupt-status assertions while reducing timing sensitivity.	src/test/java/io/github/guacsec/trustifyda/tools/OperationsTest.java

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@874af04). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #603   +/-   ##
=======================================
  Coverage        ?   69.79%           
  Complexity      ?     1067           
=======================================
  Files           ?       66           
  Lines           ?     4436           
  Branches        ?      786           
=======================================
  Hits            ?     3096           
  Misses          ?      994           
  Partials        ?      346           

Flag	Coverage Δ
integration-tests	69.79% <ø> (?)

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