Do not release the port before the process is really gone
otherwise it can be wrongly reused.
E.g.
2025-11-14T10:39:20.156573Z ERROR qdrant::startup: Panic occurred in file src/tonic/mod.rs at line 358:
called `Result::unwrap()` on an `Err` value: tonic::transport::Error(Transport, hyper::Error(Listen, Os { code: 98, kind: AddrInUse, message: "Address already in use" }))