Add equipment data sync for dualpath partner machines

When a dualpath relationship is created, equipment data is now automatically
synced between partners. This ensures both machines share the same:
- Controller type and OS
- Model number
- Serial number
- Communication settings (IP, Serial config)

Location data (mapleft, maptop) is NOT synced since dualpath machines
occupy slightly different physical positions.

Changes:
- includes/db_helpers.asp: Add CopyEquipmentDataToDualpathPartner(),
  CopyCommConfigToDualpathPartner(), and SyncDualpathPartnerData() functions
- savemachineedit.asp: Call SyncDualpathPartnerData() on dualpath creation
- savemachine_direct.asp: Call SyncDualpathPartnerData() on dualpath creation
- sql/sync_dualpath_equipment_data.sql: One-time script to sync existing pairs

Generated with [Claude Code](https://claude.com/claude-code)

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

savemachineedit.asp

@@ -646,6 +646,9 @@
 
 		' Propagate controller from dualpath partner if exists
 		Call PropagateControllerFromDualpathMachine(objConn, CLng(machineid), tempDualpathID)
+
+		' Sync equipment data between dualpath partners (controller type, model, comm config)
+		Call SyncDualpathPartnerData(objConn, CLng(machineid), tempDualpathID)
 	End If
 
 	'=============================================================================