Fix flaky timed tests

[ppinchuk]

A few of our tests kept failing on GHA (and presumably other machines) because they relied on precise timings. In this PR, we remove the dependency on machine timing by patching the time module and manually advancing the clock to make sure our code behaves as expected when the time changes.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.02%. Comparing base (fac586e) to head (c121ebf).

Additional details and impacted files

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##             main     #344   +/-   ##
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  Coverage   40.02%   40.02%           
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  Files          45       45           
  Lines        4240     4240           
  Branches      380      380           
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  Hits         1697     1697           
  Misses       2523     2523           
  Partials       20       20           

Flag	Coverage Δ
unittests	40.02% <ø> (ø)

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[Copilot]

Pull Request Overview

This PR addresses flaky timing-dependent tests by replacing real time delays with a deterministic clock mechanism. Instead of relying on actual wall-clock time (which can vary across machines and CI environments), the tests now use a patched time.monotonic that can be manually advanced.

Key Changes

• Added a patched_clock pytest fixture that provides a FakeClock class to replace time.monotonic with deterministic time control
• Modified three test files to use the patched_clock fixture instead of time.sleep() for time advancement
• Updated the README.rst Zenodo badge to use a DOI-specific URL

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/python/conftest.py	Adds the patched_clock fixture with a FakeClock class that provides deterministic time control for tests
tests/python/unit/services/test_services_usage.py	Removes time import and @flaky decorator; updates tests to use patched_clock.advance() instead of time.sleep()
tests/python/unit/services/test_services_base.py	Removes time import and @flaky decorator; updates test to use patched_clock.advance() instead of time.sleep()
tests/python/integration/test_integrated.py	Adds import for retry_module; creates fake_sleep to advance patched clock during async sleep; patches retry module's asyncio and random for deterministic behavior
README.rst	Updates Zenodo badge URL to include specific DOI reference