Version 0.4.0 — Improved API and examples

What's Changed

• AmplitudeResult now includes a baseline field (waveform minimum)
• ResultsCollector records and Excel output now include the baseline column
• __str__() added to all AnalysisRecord subclasses for human-readable print() output:
  • SessionInfo: participant name and session date/time range
  • AmplitudeResult: amplitude and baseline values
  • MidpointResult: DLMOn, DLMOff and Midpoint times
  • AreaCogResult: area and COG time
  • FitResult: function name, parameters and R²
  • AnalysisRecord base: generic fallback derived from to_dict()
• Example scripts updated to use print(meta), print(res), print(mid, ac) directly via the new __str__ representations
• Unit tests extended to cover the new baseline field and ResultsCollector column
• All example scripts simplified to import melafit as mf (single top-level import replaces multiple from melafit.xxx import ... lines)
• New minimal getting-started example example_one_fit.py: single-participant fit with bsbcf, area_cog, result collection, plot and Excel export
• os.makedirs(result_path, exist_ok=True) added to example_dlmo.py and example_full_profile.py so result directories are created automatically
• README: collapsible getting-started example with output figure added to the Getting Started section
• Version is now managed in a single source of truth: melafit/_version.py contains __version__; pyproject.toml uses dynamic = ["version"] with [tool.setuptools.dynamic] pointing to melafit._version.__version__; melafit/__init__.py imports and re-exports __version__ from ._version
• Fixed citation author in module docstring: "Ruf et al. (1992)" → "Ruf (1992)"

See the README for installation instructions and getting started.