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>

addprinter.asp

@@ -171,6 +171,13 @@
                          maxlength="50" placeholder="Name in CSF system">
                 </div>
 
+                <div class="form-group">
+                  <label for="printerpin">PIN (Optional)</label>
+                  <input type="text" class="form-control" id="printerpin" name="printerpin"
+                         maxlength="10" placeholder="e.g., 012345">
+                  <small class="form-text text-muted">Printer PIN code (leading zeros are preserved)</small>
+                </div>
+
                 <div class="form-group">
                   <label for="machineid">Associated Machine <span class="text-muted">(Optional)</span></label>
                   <!-- FIXED 2025-11-14 16:00 -->