Valkey 9.0.6 deprecates sanitize-dump-payload

Valkey 9.0.6, as detailed in the project's GitHub release notes, introduces several security and bug fixes, including the deprecation of the `sanitize-dump-payload` feature. This option is now a no-op, meaning it no longer performs its intended function of sanitizing payloads during RDB load and RESTORE operations. Instead, payloads are always deep-validated to prevent deferred assertion crashes. Operators are advised to note this change, as any configurations relying on `sanitize-dump-payload` will no longer have an effect.

Before upgrading, operators should ensure that their systems do not depend on the deprecated `sanitize-dump-payload` option for payload validation. If this feature was previously used as a safeguard, it is critical to verify that the new deep-validation mechanism aligns with operational requirements. Additionally, configurations should be reviewed to identify any lingering references to the deprecated option, as these could lead to confusion or misinterpretation of system behavior after the upgrade.