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>

machinemapeditor.asp

@@ -262,7 +262,7 @@ Set rsM = objConn.Execute("SELECT m.machineid, m.machinenumber, m.alias, m.maple
                           "LEFT JOIN machinetypes mt ON mo.machinetypeid = mt.machinetypeid " &_
                           "WHERE m.pctypeid IS NULL " &_
                           "AND m.isactive = 1 " &_
-                          "AND mt.machinetypeid NOT IN (1, 16, 17, 18, 19, 20) " &_
+                          "AND mt.machinetypeid NOT IN (1, 16, 17, 18, 19, 20, 46) " &_
                           "AND mt.machinetypeid < 33 " &_
                           "ORDER BY m.machinenumber")
 Do While Not rsM.EOF