v0.6.0

Added

• Parallel DDA orientation averaging using joblib.Parallel with loky backend
• Flattened (wavelength × orientation) task grid into single parallel dispatch for full CPU utilization
• n_jobs parameter on solve_optics() — number of parallel workers (default 32)
• show_progress parameter on solve_optics() — tqdm progress bars (default True)
• Error-tolerant parallel execution — failed orientation tasks are logged and skipped, not discarded

Changed

• n_dirs default changed from 100 to 50
• Warning threshold for low direction count changed to n_dirs < 30
• Near-field computation disabled in parallel orientation path (results are discarded)
• Updated validate_mie_vs_dda example to use parallel orientation averaging

Fixed

• Restored phase-function-specific warning when compute_phase_func=True with n_dirs < 100
• Explicitly set backend="loky" to prevent unsafe threading with PyJulia

Documentation

• Expanded orientational averaging section in optical computation guide with parallel execution, parameters, and code example
• Updated Mie vs DDA validation tutorial to reflect n_dirs=50 and n_jobs=32
• Added orientational_average, n_dirs, n_jobs, show_progress to quickstart key parameters
• Added Parallel Orientation Averaging to README features and updated solve_optics API signature
• Documented tqdm and joblib as required dependencies in installation guide