issue: #39157
Overview:
Support search by PK by resolving IDs to vectors on Proxy side. Upgrade
go-api to adapt to new proto definitions.
Design:
- Upgrade milvus-proto/go-api to latest master.
- Implement handleIfSearchByPK in Proxy: resolve IDs to vectors via
internal Query, then rewrite SearchRequest.
- Adapt to 'SearchInput' oneof field in SearchRequest across client and
handlers.
- Fix binary vector stride calculation bug in placeholder utils.
Compatibility:
- Old Pymilvus can still work w/o this feature
What is included:
- Dense and Sparse
- Multi vector fields
- Rejection on BM25
What is **not** include:
- Hybrid Search
- EmbeddingList
- Restful API
Signed-off-by: Li Liu <li.liu@zilliz.com>