Updated the author name and copyright statements across the
gns3_copilot module. The name has been standardized from
"Guobin Yue" to "Yue Guobin (岳国宾)" to reflect the correct
author attribution including Chinese characters.
Add comprehensive design document outlining the race condition issue when multiple users simultaneously operate on the same network device via GNS3-Copilot Agent. The document details the problem statement, affected components, and proposes two solutions: device-level mutex lock (recommended) and connection pooling with session isolation. It includes implementation details, API changes, and UI considerations to ensure safe concurrent operations.
