Add Keyword Search Support to Milvus

franciscojavierarceo

Is your feature request related to a problem? Please describe.
Should follow the new V2 pattern here: #5082

Describe the solution you'd like
Should work like:

results = store.retrieve_online_documents_v2(
    features=[
        "document_embeddings:Embeddings",
        "document_embeddings:content",
        "document_embeddings:title",
    ],
    query=query_embedding,
    query_string="my query",
    top_k=3,
).to_dict()
print(results)

Describe alternatives you've considered
N/A

Additional context
N/A