#10007 refactor: Decouple Hub error handling from Requests Pull request opened by edgarrmondragon Description Checklist • I have read the contribution guide Was generative AI tooling used to co-author this PR? • Yes (please specify the tool below) Related Issues • Closes #XXXX Summary by Sourcery Refine Meltano Hub client error handling to use domain-specific exceptions and simplify HTTP response processing. Enhancements: • Update Hub error types to subclass MeltanoError and use clearer, centralized error messages for plugin type, variant, and connection failures. • Simplify Hub client HTTP status handling by mapping 4xx responses to plugin type errors and 5xx responses to connection errors without relying on requests exceptions. • Tighten internal hub client code with minor typing and style adjustments, including improved header and URL handling. Build: • Remove the types-requests typing dependency from the project configuration. Tests: • Adjust Hub service tests and test HTTP client fixture to validate the new error messages and 5xx response handling behavior. meltano/meltano