Fix root functions for events with initialValue=trigger=false

[dweindl]

• Fix generation of root functions for SBML event triggers if both the trigger expression and the trigger initial value are False.

  Fixes Incorrect root handling for some event triggers involving False and initialValue=false #2908.

• Support for true as trigger

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.06%. Comparing base (167864b) to head (e05222f).
⚠️ Report is 54 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2910      +/-   ##
==========================================
- Coverage   79.62%   79.06%   -0.56%     
==========================================
  Files         358      358              
  Lines       23033    23035       +2     
  Branches     1581     1581              
==========================================
- Hits        18339    18213     -126     
- Misses       4683     4811     +128     
  Partials       11       11              

Flag	Coverage Δ
cpp	74.99% <100.00%> (+0.01%)	⬆️
cpp_python	33.17% <0.00%> (-0.01%)	⬇️
petab	38.98% <0.00%> (-0.01%)	⬇️
python	73.85% <100.00%> (+0.01%)	⬆️
sbmlsuite-jax	?

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

Files with missing lines	Coverage Δ
python/sdist/amici/sbml_import.py	82.21% <100.00%> (-11.99%)	⬇️

... and 8 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.