certifi==2026.5.20 conflicts with aiocryptopay 0.4.8, which hard-caps
certifi<2024.0.0, so pip could not resolve and the Docker image build
failed. Revert to the transitive certifi; PYSEC-2024-230 stays unfixable
until aiocryptopay relaxes its cap. Keeps the PyJWT 2.13.0 bump.
pip-audit flagged 6 advisories: PyJWT 2.12.1 (PYSEC-2026-175/177/178/179,
fixed in 2.13.0) and transitive certifi 2023.11.17 (PYSEC-2024-230, fixed
in 2024.7.4). Bump PyJWT and pin certifi to its latest release to enforce
the resolved version.