Keep `_stream_name_events()` non-blocking so a slow memory-channel
consumer cannot back up the kernel topology queue. Raise
`TIPCNameEventOverflow` and end the subscription rather than drop a
transition or let the socket reader stall. Discovery consumers must
then resubscribe and rebuild their name-table view.
Also,
- document topology semantics and scope with Linux references
- diagram the `.connect()`/`.getpeername()` withdrawal schedules
- explain the child-service and callable requirements in the
two-host example
Review: PR #493 (copilot-pull-request-reviewer[bot],goodboy)
https://github.com/goodboy/tractor/pull/493
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Gud Boi
ebc196e225