Field mapping breaks when handling UTF-16 data

[zackkatz]

To reproduce:

1. Load a UTF-16 CSV
2. Create a \DataKit\DataViews\Field\StatusIndicatorField
3. Use ->mapping() to try and map a status

What you see:
There aren't any matches other than inactive because the match fails due to different bytes being compared.

Then use a UTF-8 CSV and it works.

See https://gravitykit.slack.com/archives/C076T3EQNS1/p1725134616822689 for a video (with sensitive data).