fix(vectordb): add ap-southeast-1 region host mappings for VikingDB

[abinch]

Description

When deploying OpenViking with volcengine vectordb backend and region: "ap-southeast-1", a KeyError is raised because the _global_host dictionaries in both ClientForConsoleApi and ClientForDataApi only contain Chinese mainland regions.

This PR adds the missing host entries for the ap-southeast-1 (Johor) region.

Related Issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• Added "ap-southeast-1": "vikingdb.ap-southeast-1.volcengineapi.com" to ClientForConsoleApi._global_host
• Added "ap-southeast-1": "api-vikingdb.vikingdb.ap-southeast-1.volces.com" to ClientForDataApi._global_host

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

Additional Notes

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[qin-ctx]

thanks！