[Defect]: Missing definition of length variable for CMAC and DSA algorithm family in Cryptography registry

## Describe the defect

The variants for CMAC and DSA in schema/cryptography-defs.json have {length} variable but definition of this variable is missing. Expecting clear definition like keyLength, tagLength, etc.

CMAC: CMAC[-{cipherAlgorithm}][-{length}]
DSA: DSA[-{length}][-{hash}]

## Additional context

Both issues are data-quality / naming defects in the Cryptography Registry and can be fixed without changing schema behavior or introducing new algorithms.