Implement presence API for management SDK persistent mode

[Y-Sindo]

No description provided.

[vwxyzh]

rough idea for n-way merge for multi-endpoint.
#2126

sequenceDiagram
    participant c as Client
    participant s as SDK
    participant m as Multi Endpoint Service Connection Container
    participant s1 as Service Connection Container For Service 1
    participant s2 as Service Connection Container For Service 2

    c->>s: Enumerate group member
    s->>m: Enumerate group member
    loop
        opt Need more data from Service 1
            m->>s1: Enumerate group member with pagination
            s1->>m: Pagination result
        end
        opt Need more data from Service 2
            m->>s2: Enumerate group member with pagination
            s2->>m: Pagination result
        end
        loop
            m->>m: N-way merge
            m->>s: Yield return
            s->>c: Yield return
        end
    end

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