v1.2.1 — renpho-py

Security patch release from validated source 66bfe23.

Requires certifi>=2026.10.19 so new installations use the updated CA bundle following the eMudhra certificate-authority compromise. This release also delivers the security dependency updates already merged and tested on main.

Validation: 61 offline tests, Ruff, mypy, source and wheel builds locally; hosted Python 3.10–3.13 test matrix and lint pass on both the release PR and merged main revision.