AI update based on proto changes

[viambot]

This is an AI-generated PR to update the SDK based on proto changes. The AI may make mistakes so review carefully.

Summary of Changes:
Here's a summary of the changes:

• Optional organizationId for listMachineSummaries: The organizationId parameter is now optional in the listMachineSummaries method.
• Cross-Organization Search: When organizationId is not provided, the method will query machine summaries across all organizations the caller has access to.
• Implementation: The method signature, request construction (sending an empty string '' if organizationId is undefined), and JSDoc documentation have been updated accordingly.
• Testing: Added a new unit test to verify the behavior when organizationId is omitted.