p9-fb-10: verifies that a Korean (Hangul) token survives the
ingest → FTS5 lexical search round-trip via the kebab-app facade.
NFC normalization is wired upstream in kebab-normalize; this test
only exercises end-to-end correctness — no AVX, no fastembed required.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>