selenium depends on websocket-client which installs a top-level
`websocket` package that shadows our src/websocket/ module on CI.
Renaming to ws_manager eliminates the conflict entirely — no more
sys.path hacks needed in conftest or Selenium tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Comprehensive reference covering project structure, architecture patterns,
testing conventions, development workflows, and key configuration for AI
assistants working in this repository.
https://claude.ai/code/session_01Y77ZMumHHk5t9wT8ASrpwZ