PC set-up: one line per PC (/setup/<name>.ps1), the admin laptop always let in, and the admin check no longer breaks the script

- the inserted administrator check split the header comment, leaving '} for ... run ONCE' as code: WS and SC
  join.ps1 failed to parse (Windows' parser: Missing opening '(' after keyword 'for'); now after the whole line
- site.admin_ips / admin_keys (laptop 10.6.7.38, fixed in UniFi) go into every PC script's firewall rule and key
  files, and into the Mac join line, so running a set-up again never shuts the laptop out
- scripts verified by Windows' own PowerShell parser on the NA Lighting PC

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_setup.py

@@ -29,7 +29,7 @@ class TestScripts(unittest.TestCase):
             text = scripts.windows_setup(CFG, "lighting")
             self.assertIn("$Key = '%s'" % KEY[0], text)
             self.assertIn("$KeyMark = 'status-panel@NA-Ingest'", text)
-            self.assertIn("$IngestIPs = @('10.1.1.1', '10.6.3.222')", text)
+            self.assertIn("$IngestIPs = @('10.1.1.1', '10.6.3.222', '10.6.7.38')", text)   # NA Ingest, then the admin laptop
             for exe in ("Vista.exe", "Arena.exe", "rtpMIDI.exe"):
                 self.assertIn("(Find-Exe '%s')" % exe, text)
             self.assertIn("foreach ($svc in @('rtpMIDIService'))", text)