Fix vectors results bug(#1476) & change vector id type to string(#1511) (#1514)

* add sign-off

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

* add index HNSW in http module

Signed-off-by: Yhz <yinghao.zou@zilliz.com>

Co-authored-by: Jin Hai <hai.jin@zilliz.com>