Added OceanBase as an option for the vector store in Dify

[powerfooI]

Checklist:

Important

Please review the checklist below before submitting your pull request.

• Please open an issue before creating a PR or link to an existing issue
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

Description

This PR added OceanBase CE as an option for the vector store in Dify.

Fixes #9982.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

I have set VECTOR_STORE=oceanbase to enable oceanbase to act as the vector store of dify and tested functionalities of datasets. Creating dataset, uploading documents, retrieving chunks and deleting dataset work as expected.

The followings are screenshots of the test,

[JohnJyong]

pls fix your style check and api test, thanks

[powerfooI]

pls fix your style check and api test, thanks

OK. I've fixed it. Sorry for forgetting to update poetry.lock and reformat the code after fixing the newest conflicts.