Python: support opengauss vector store

[vincentsunx]

Motivation and Context

1. Why is this change required?
   semantic kernel support openGauss vector store(python)
2. What scenario does it contribute to?
   This is a contribution to make semantic kernel support opengauss vector store for python scenarios

Description

Add a new Semantic Memory Connector leveraging openGauss datavec. Update the syntax example to demonstrate how it is used.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[moonbox3]

Hi @vincentsunx, please provide a Motivation and Context and Description above. Thanks.

[moonbox3]

@vincentsunx there's a lot of current work to re-do/re-locate the memory connector abstractions. That work is on-going in this branch. Please work with @eavanvalkenburg to coordinate how this work will align with what he's doing.

[vincentsunx]

@microsoft-github-policy-service agree

…

------------------ Original ------------------ From: microsoft-github-policy-service[bot] ***@***.***> Date: Thu,May 22,2025 11:39 AM To: microsoft/semantic-kernel ***@***.***> Cc: Dechao Sun ***@***.***>, Mention ***@***.***> Subject: Re: [microsoft/semantic-kernel] Python: support opengauss vectorstore (PR #12231)

[vincentsunx]

@microsoft-github-policy-service agree

[vincentsunx]

@vincentsunx there's a lot of current work to re-do/re-locate the memory connector abstractions. That work is on-going in this branch. Please work with @eavanvalkenburg to coordinate how this work will align with what he's doing.

So the main branch will not add new connector modifications currently?
Do I need to push the code to branch: feature-python-vector-stores-preb or wait for the branch vector to be merged into main, then push code to main branch.