Assign random port number while `test-init`

[2chanhaeng]

Summary

Assign random port number while test-init.

Problem

Currently, test-init extracts the port number from the server output. However, this is inaccurate and there is a possibility of port conflicts.

Proposed Solution

For each tests in test-init, pick a random number between 10000 and 65535 and assign it.

Alternatives Considered

No response

Scope / Dependencies

No response

[dahlia]

Port 0 binding might be worth considering here—when you bind to port 0, the kernel automatically assigns an available port from the ephemeral range, which eliminates conflicts entirely rather than just reducing the probability. This pattern is well established for test suites, and the assigned port can be retrieved afterward (e.g., via getsockname()). Since the current implementation already parses the port from server output, that approach could carry over naturally.