Enter a realized netns before root registry, IPC and runtime
startup, then restore the calling thread before owned bindspace
teardown.
Deats,
- duplicate the namespace FD so caller ownership stays intact
- preserve primary body errors across restore and close failures
- reject persistent `mp_forkserver` roots with stale netns risk
- cover cancellation, real netns entry, UDS RPC and public WG
composition
Prompt-IO: ai/prompt-io/opencode/20260830T025202Z_b1f6ade8_prompt_io.md
(this patch was generated in some part by `opencode` using `gpt-5.6-sol` (`openai`))
Gud Boi
793ba9f94c