[Snyk] Security upgrade cryptography from 45.0.7 to 46.0.7

[ashmuck]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• requirements/test.txt

⚠️ Warning

pytest-subtests 0.13.1 has requirement pytest>=7.0, but you have pytest 6.2.5.
moto 4.2.14 requires cryptography, which is not installed.
celery 5.3.0 requires kombu, which is not installed.

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• Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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Note

Low Risk
Low risk: this only adds a minimum version pin for cryptography in test dependencies to address a known vulnerability; potential impact is limited to CI/test environment dependency resolution.

Overview
Adds an explicit cryptography>=46.0.7 entry to requirements/test.txt, with a comment noting it’s a Snyk-driven pin to avoid a vulnerability.

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