Fix base_url assignment in client initialization

[sudoping01]

Pull Request

Description

Fixes incorrect assignment logic for base_url during Client initialization. Ensures that the explicitly provided base_url parameter takes priority instead of reassigning from an uninitialized self.base_url.

Related Issue(s)

N/A

Changes Made

• Corrected base_url assignment so that:

  self.base_url = base_url

  is used instead of mistakenly referencing self.base_url.

• No additional documentation or tests needed for this minimal fix.

Testing

• Manually instantiated Client with/without custom base_url to confirm expected behavior.
• All tests pass and no linting errors detected.

Checklist

• Code follows style guidelines (ruff, isort, optionally black).
• Tests added or updated in the cookbook module. (Not needed for minor logic fix)
• Documentation updated (N/A).
• All tests pass.
• No linting errors.

Additional Notes

This prevents potential bugs in SDK usage when client configuration relies on custom endpoints.

Tag @sudoping01 for review.
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