Add PC-machine relationships API and report, fix shopfloor dashboard

- Add getPCMachineRelationships API endpoint for PC-to-machine mappings
- Add pcmachinerelationships.asp report page with copy table/CSV/JSON export
- Fix shopfloor dashboard to immediately hide deactivated notifications
- Add Firewall (machinetypeid 46) support to network device pages
- Add model migration warning banner to networkdevices.asp
- Create SQL script for hybrid model/machine type view

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

networkmap.asp

@@ -246,7 +246,7 @@ strSQL = "SELECT printers.printerid AS id, machines.machinenumber AS name, machi
          "LEFT JOIN machinetypes mt ON m.machinetypeid = mt.machinetypeid " &_
          "LEFT JOIN vendors v ON mo.vendorid = v.vendorid " &_
          "LEFT JOIN communications c ON m.machineid = c.machineid AND c.isprimary = 1 AND c.comstypeid = 1 " &_
-         "WHERE m.machinetypeid IN (16, 17, 18, 19, 20) " &_
+         "WHERE m.machinetypeid IN (16, 17, 18, 19, 20, 46) " &_
          "AND m.isactive = 1 " &_
          "AND m.mapleft IS NOT NULL " &_
          "AND m.maptop IS NOT NULL " &_