MOAD-0004 (CWE-312 Logged Secret): CLEAN

XEX decryption key constants (xe_xex2_retail_key, xe_xex2_devkit_key) are
never logged. Encryption errors log only status codes, not key bytes.
Session keys (session_key_) are used in AES decrypt calls but never passed
to any XELOG macro. No credentials, tokens, or secret key material logged
verbatim.
