eht-imaging

A maintenance release fixing latent gradient bugs in less-common polarimetric imaging modes — standard total-intensity (I) and linear-polarization (P) imaging were unaffected.

• mcv / vcv polarization transforms: restored the missing off-diagonal Jacobian cross-term to fix the gradient when imaging circular polarization (Stokes V ≠ 0) together with linear polarization.
• Simultaneous Stokes I + polarization imaging: the Stokes-I log-transform Jacobian is no longer overwritten by the polarization gradient.
• Polarimetric TV regularizer: corrected the first-row/column boundary masking in the ptv gradient.
• Crashes fixed: the m fractional-polarization data term and the msimple / vflux polarimetric regularizers when solving for I and polarization simultaneously
• NumPy ≥ 1.24 compatibility: diagonalized closures (cphase_diag, logcamp_diag) build again.
• Tests / CI: added a minimal gradient-validation suite (analytic vs finite-difference, NFFT vs direct) running on Python 3.8 and 3.11.

Full changelog: https://github.com/achael/eht-imaging/compare/v1.3.1...v1.3.2