A string used as part of a mechanism for checking if translated versions of this string are out of date.
public string Lock;
This field contains the first 8 characters of the SHA-256 hash of the line's text as it appeared in the base localization CSV file.
When a new StringTableEntry is created in a localized CSV file for a .yarn file, the Lock value is copied over from the base CSV file, and used for the translated entry.
Because the base localization CSV is regenerated every time the .yarn file is imported, the base localization Lock value will change if a line's text changes. This means that if the base lock and translated lock differ, the translated line is out of date, and needs to be updated.