- handle_pull_request: extracted to static method, conn_mgr lock no longer
held during network I/O (read request + write response)
- handle_address_request: inlined at call site with brief lock to gather
data, response written after lock release
- handle_session_relay: capacity check + target lookup under brief lock,
rejection write moved outside lock scope
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>