fix: update Axios types for request interceptor compatibility

TypeScript Type Fixes for Axios Interceptors

Changes

• Updated Axios request interceptor type from AxiosRequestConfig to InternalAxiosRequestConfig
• Fixed type compatibility issues in API client configuration
• Improved type safety in HTTP request handling

Testing

• Verified build completes successfully
• Confirmed type checking passes
• Tested HTTP requests functionality

Additional Notes

• No runtime behavior changes, purely type-level improvements
• Follows Axios v1.x type system requirements

Link to Devin run: https://app.devin.ai/sessions/8d4cf88316464054b642a663127dd024