Fix TypeError: buildSelect() Argument #3 ($value) must be of type string.
The getFieldValue() method can return boolean for certain DB values,
causing type mismatch with strict typed buildSelect() method.
Added (string) casts to all buildSelect() calls in Vignette Ads section:
- vignetteTrigger
- size
- opacity
- reshowTime
- maxSession
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Co-Authored-By: Claude <noreply@anthropic.com>
1f0ce58b22