v0.3.0

Added

• DDA-Mie-pyRadtran optical computation pipeline with stage 1 (compute optics), stages 2-3, and pipeline config/directory structure
• Sphinx documentation site with user guide, tutorials (with embedded example scripts), API reference (autodoc), and contributing guide
• Sphinx optional-dependencies group (sphinx, sphinx-rtd-theme, myst-parser, sphinx-copybutton)
• GitHub Actions workflow for building and deploying Sphinx docs to GitHub Pages

Changed

• DDA particle radius increased to 200nm with manual 5nm dipole spacing

Fixed

• DDA multi-wavelength polarizability: alpha_e is now recomputed per wavelength instead of reusing the first wavelength's value (previously caused up to 435% error)
• DDA depolarized P11 phase function: now properly averages both orthogonal polarizations instead of using only one
• DDA precision targets: swapped inverted high/low values so "high" produces finer dipole spacing
• P11 comparison plots: handle different theta grid dimensions between DDA and Mie