GST canonical declaration deposit for the KIC 8462852 / Tabby's Star audit

Canonical GST declaration deposit for the KIC 8462852 / Tabby’s Star sector-calibration audit. The deposit fixes G_s, Z_s, Θ_s, the five literature-anchored Kepler windows, and the sector-calibration grid n_s={15,20,25}, with N_s=20 retained as the reporting dimension. It references MAST Kepler light-curve and target-pixel data and Meng et al. 2017 for the UV-to-mid-IR chromatic support layer. Earlier strict fixed-N20 comparison runs are not the canonical deposited declaration.