chore(release): bump version to 0.3.4
- Update workspace version in Cargo.toml
- Update Python package version in pyproject.toml
- Update CHANGELOG with CodSpeed integration, Phase 4/4.5, and CI improvements
fix(codspeed): correct mode settings for memory and walltime jobs
- Use mode: memory instead of mode: instrumentation with instruments
- Add -m walltime flag for walltime build
- Add -m memory flag for memory build