The Search v2 API rejects queries longer than 30 characters (counted by
Unicode code point, CJK 1 each) with 99992402 field validation failed —
it is a hard error, not truncation. Surface this in the --query -h help
text and the lark-drive search skill so callers compress long queries
before searching instead of hitting the error.
Change-Id: Ieb30a66edae7a573690c49719627ec8fb2500a1a