pub fn set_subprocess_ring_persist_path(path: PathBuf)Expand description
v1.0.10 §D6 — enable subprocess-ring persistence at the given path.
CLI startup wires this to ~/.local/share/smix/subprocess-ring.json
so /diagnostic/dump payloads survive supervisor cycles. Optional;
missing this call keeps pre-v1.0.10 in-memory-only behavior.