Should we hide user data when printing tuples?

[sergepetrenko]

Tarantool prints tuples as is in logs when logging some errors like ER_TUPLE_FOUND:

ER_TUPLE_FOUND: Duplicate key exists in unique index "pk" in space "test" with old tuple - [1, "topsecret1"] and new tuple - [1, "topsecret2"]

AFAIU all sensitive data should be stripped from the logs. We might provide a space format option telling which fields should be masked in the log, so the result would be:

old tuple - [1, #####] and new tuple - [1, #####]

[R-omk]

also tuples may be too big to print all data