* feat: add download functionality for example operator and update Dockerfile
* feat: enhance download response by exposing content disposition header
* feat: update download function to accept filename parameter for example operator
* feature: unstructured支持简单pdf处理
* feature: update values.yaml to enhance ray-cluster configuration with security context, environment variables, and resource limits
* feature: update deploy.yaml and process.py for mineru server configuration and PDF processing enhancements
* feature: update deploy.yaml and process.py for mineru server configuration and PDF processing enhancements
* feature: improve PDF processing logic and update dependencies in process.py and pyproject.toml
* feature: improve PDF processing logic and update dependencies in process.py and pyproject.toml
* feature: update Dockerfile for improved package source mirrors and add mineru-npu to build targets
