Certificate & TLS Unit Tests 🔐

Unit tests for the top-level certificate and TLS helper modules in utils/: cert_utils.py (wildcard/exact match logic, newest-certificate selection) and tls_common.py (flavor handling, SAN overrides, domain normalisation).

Tests in this directory MUST only cover the pure-function behaviour of utils.cert_utils and utils.tls_common. Lookup-plugin integration that depends on these modules MUST live under tests/unit/python/plugins/lookup/.

For framework and make test-unit usage see unit.md.