Prepare release 0.34.0

[dweindl]

Bump version, update changelog.

• Add optax snippet to jax petab notebook. #2928
• doc: Update caveats #2930

[codecov]

Codecov Report

❌ Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.01%. Comparing base (cc55c45) to head (94c7dc4).
⚠️ Report is 45 commits behind head on main.

Files with missing lines	Patch %	Lines
models/model_calvetti_py/model_calvetti_py.h	0.00%	2 Missing ⚠️
models/model_dirac_py/model_dirac_py.h	0.00%	2 Missing ⚠️
models/model_events_py/model_events_py.h	0.00%	2 Missing ⚠️
...odel_jakstat_adjoint_py/model_jakstat_adjoint_py.h	0.00%	2 Missing ⚠️
...ls/model_nested_events_py/model_nested_events_py.h	0.00%	2 Missing ⚠️
models/model_neuron_py/model_neuron_py.h	0.00%	2 Missing ⚠️
models/model_robertson_py/model_robertson_py.h	0.00%	2 Missing ⚠️
models/model_steadystate_py/model_steadystate_py.h	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2929      +/-   ##
==========================================
- Coverage   79.57%   79.01%   -0.57%     
==========================================
  Files         362      362              
  Lines       23157    23157              
  Branches     1588     1588              
==========================================
- Hits        18428    18297     -131     
- Misses       4717     4848     +131     
  Partials       12       12              

Flag	Coverage Δ
cpp	74.94% <0.00%> (ø)
cpp_python	33.12% <0.00%> (ø)
petab	38.78% <ø> (ø)
python	73.80% <0.00%> (ø)
sbmlsuite-jax	?

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

Files with missing lines	Coverage Δ
models/model_calvetti_py/model_calvetti_py.h	56.96% <0.00%> (ø)
models/model_dirac_py/model_dirac_py.h	58.16% <0.00%> (ø)
models/model_events_py/model_events_py.h	64.88% <0.00%> (ø)
...odel_jakstat_adjoint_py/model_jakstat_adjoint_py.h	70.06% <0.00%> (ø)
...ls/model_nested_events_py/model_nested_events_py.h	62.17% <0.00%> (ø)
models/model_neuron_py/model_neuron_py.h	72.02% <0.00%> (ø)
models/model_robertson_py/model_robertson_py.h	53.69% <0.00%> (ø)
models/model_steadystate_py/model_steadystate_py.h	62.41% <0.00%> (ø)

... and 6 files with indirect coverage changes

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