fix(tests): auto-derive unique port+state-dir per worktree (fixes parallel pytest)

tests/test_sprint32.py

@@ -1,6 +1,7 @@
 from pathlib import Path
 from unittest.mock import MagicMock, patch
 import subprocess
+import os
 from api.startup import auto_install_agent_deps
 
 class TestAutoInstallAgentDeps: