Hanging when running PostgreSQL

[ProchaLu]

We've been investigating an issue where Execa does not return control to the parent process after launching a PostgreSQL setup script. The child process starts PostgreSQL successfully, and logs confirm that the database is running, but Execa remains blocked instead of completing execution.

To reproduce the issue, we created a minimal Docker setup where this happens consistently. The setup consists of a Node.js script (parent process) that spawns a Bash script (child process) responsible for initializing and starting PostgreSQL. The expectation is that Execa should return after PostgreSQL starts, but instead, it never does.