archudzik/grbSpectralLags: GRB spectral lag catalog and analysis code

Version 3.0.0 release for the GRB spectral-lag analysis accompanying the manuscript: The Fifty-Fifty Problem: Sign Symmetry in Gamma-Ray Burst Spectral Lags This release includes the processed Fermi/GBM and Swift/BAT spectral-lag catalogs, significant-lag subsets, zero-consistent event labels, diffusive-closure inversion outputs, plotting scripts, and reproducibility code used for the manuscript figures and tables. Main contents: Fermi/GBM lag catalog for bursts processed from 2008-2026 Swift/BAT verification lag catalog Significant-positive, significant-negative, and zero-consistent classifications Spatial and temporal null-test outputs Positive/negative lag-distribution analysis Diffusive-closure inversion results Figure-generation scripts for the manuscript and appendices This release is intended to support reproducibility of the manuscript analysis and Zenodo archival citation.