jsonEndArrayField

Closes a JSON array field by appending the closing bracket. Takes json string, appends "]", returns result via ReturnString.

This function completes array field syntax. Appends closing bracket to match jsonBeginArrayField opening. Must be called after adding all array elements. Completes valid JSON array syntax. Use as final step for array fields. Common pattern: jsonBeginArrayField, add elements, jsonEndArrayField. Bracket matching is critical for valid JSON - every begin must have matching end.