Item location mapping added

What's Changed

• v1.3.0
  • Added option to import the matched Sierra item's location into a configurable Transaction field via the new LocationDestinationField and LocationValueType settings.
  • Fixed a typo in the VolumeSourceFieldRegularExpression guard that prevented the configured regex from ever being applied. Sites with a non-empty regex (including the shipped default) will now see the regex used during volume matching.
  • Hardened regex-based volume parsing: the regex is now skipped when the source field is nil or blank, the original field value is preserved when the regex finds no match, and zero-width regex matches no longer overwrite the volume with an empty string.
  • Redacted ClientKey, ClientSecret, and Sierra API access tokens from the addon's log output. These values were previously written to the log at the DEBUG level on every timer tick.