Add USB checkout system and SSO profile page

New Features:
- USB Device checkout/check-in system with barcode scanning
  - displayusb.asp: List all USB devices with status
  - addusb.asp: Add new USB devices via barcode scan
  - checkout_usb.asp/savecheckout_usb.asp: Check out USB to SSO
  - checkin_usb.asp/savecheckin_usb.asp: Check in with wipe confirmation
  - usb_history.asp: Full checkout history with filters
  - api_usb.asp: JSON API for AJAX lookups
- displayprofile.asp: SSO profile page showing user info and USB history
- Date/time format changed to 12-hour (MM/DD/YYYY h:mm AM/PM)
- SSO links in USB history now link to profile page via search

Database:
- New machinetypeid 44 for USB devices
- New usb_checkouts table for tracking checkouts

Cleanup:
- Removed v2 folder (duplicate/old files)
- Removed old debug/test files
- Removed completed migration documentation

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

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

includes/sql.asp.production

@@ -1,8 +1,8 @@
 <%
-	Dim objConn
+	' objConn - script-global connection object (no Dim for global scope)
 	Session.Timeout=15
 	Set objConn=Server.CreateObject("ADODB.Connection")
 	objConn.ConnectionString="DSN=shopdb;Uid=root;Pwd=WJF11sql;Option=3;Pooling=True;Max Pool Size=100;"
-	objConn.Open 
+	objConn.Open
 	set rs = server.createobject("ADODB.Recordset")
 %>