Move multi-provider into SDK

[toddbaert]

[multi-provider] Move multi-provider into SDK

The multi-provider in the contrib repo should be moved into the SDK.

Requirements:

• multi-provider is moved from contribs into SDK
• multi-provider deprecated/removed in the contribs (@toddbaert @beeme1mr or @aepfli can help with this)
• optionally, there may be simplifications than can be done once the multi-provider has access to SDK internals

Note:

• the multi-provider should be marked as experimental for now, using in-line docs.

[suvaidkhan]

Hey I'd like to work on this!

[chrfwow]

Let us know if you have any issues, @suvaidkhan !

[suvaidkhan]

Let us know if you have any issues, @suvaidkhan !

In the contrib implementation the initialize method of multiprovider creates a JSON blob to store the metadata info. And uses the following dependency -

<dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20250517</version>
  </dependency>

Should I add the same dependency to the SDK as well?

[aepfli]

The first question would be: Do we already have another JSON library within our codebase that we might want to use? If not, I think it is feasible to add it. But in general we want to keep our dependencies in the SDK as limited as possible

[suvaidkhan]

Quick question @aepfli and @chrfwow should I add the Multiprovider documentation in the providers section or create a new section?

[chrfwow]

I would say to nest it under the provider section, but I have no strong feelings either way

[suvaidkhan]

@chrfwow just realized this change has not been implemented in all the SDKs should I be making the change in the spec now or are we holding off till all are merged?

[chrfwow]

I would say just go on, we will change the spec seperately. @toddbaert ?

[Vishalup29]

@chrfwow I see there is no update on this since long. I am a first contributor and am interested to work on this

[chrfwow]

@Vishalup29 thanks, I assigned the issue to you. Reach out if you need anything!