[Fix] Move binary data from KEYS to ARGV in fuzzy and neural scripts

[Fix] Move binary data from KEYS to ARGV in fuzzy and neural scripts

Same expand_keys corruption issue as the Bayes fix: binary data passed
as KEYS gets template-expanded, stripping 0x24 bytes.

fuzzy_update: move operation parameters and raw digest to ARGV, keep
only hash_key, count_key, and shingle keys as KEYS.

neural_save_unlock: move compressed ANN weights, PCA matrix, and all
non-key parameters to ARGV, keep only Redis key names as KEYS.