Fix softioc system test

[jsouter]

Closes #228

Small fix needed due to changes in logging messages that softioc system tests wait for before timing out. Also have removed src from the doctests for now as the Tracer docstring was being collected and failing under pytest.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.59%. Comparing base (9c2042a) to head (b947783).
⚠️ Report is 16 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fastcs/launch.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #229      +/-   ##
==========================================
- Coverage   92.34%   88.59%   -3.76%     
==========================================
  Files          40       44       +4     
  Lines        2077     2253     +176     
==========================================
+ Hits         1918     1996      +78     
- Misses        159      257      +98     

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[GDYendell]

I think the coverage failure is not reliable because the tests are broken on main anyway.