Function vldb_sqlite_database_search_fts 

#[unsafe(no_mangle)]
pub extern "C" fn vldb_sqlite_database_search_fts(
    handle: *mut VldbSqliteDatabaseHandle,
    index_name: *const c_char,
    tokenizer_mode: VldbSqliteFfiTokenizerMode,
    query: *const c_char,
    limit: u32,
    offset: u32,
) -> *mut VldbSqliteSearchResultHandle

通过数据库句柄执行 FTS 检索并返回结果句柄。 Execute FTS search through a database handle and return a result handle.