Function vldb_sqlite_database_upsert_custom_word 

#[unsafe(no_mangle)]
pub extern "C" fn vldb_sqlite_database_upsert_custom_word(
    handle: *mut VldbSqliteDatabaseHandle,
    word: *const c_char,
    weight: u64,
    out_result: *mut VldbSqliteDictionaryMutationResultPod,
) -> i32

通过数据库句柄热更新自定义词。 Hot-update a custom word through a database handle.