Add scrypt (RFC7914) to Cryptography Registry

[Mehrn0ush]

Summary

The Cryptography Registry currently includes yescrypt (RFC7919) but does not include scrypt (RFC7914). Since scrypt is widely deployed and standardized, it should be present as a first-class entry in the registry.

Motivation / Security Rationale

Many SBOM and cryptography metadata consumers rely on the registry to normalize algorithm identifiers. Missing scrypt can lead to inconsistent naming, reduced interoperability, and weaker automated analysis for password-hashing/KDF usage.

Proposed Change

Add an entry for:

• Algorithm: scrypt
• Reference: RFC7914
• Reference URL: https://doi.org/10.17487/RFC7914

Acceptance Criteria

• schema/cryptography-defs.json contains a consistent entry for scrypt
• References follow the registry’s existing RFC naming and URL conventions
• No breaking changes; additive registry update only