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>

displayprinter.asp

@@ -477,6 +477,13 @@ End If
                                 <input class="form-control" type="text" name="printercsfname" value="<%=Server.HTMLEncode(rs("printercsfname") & "")%>" placeholder="<%=Server.HTMLEncode(rs("printercsfname") & "")%>">
                             </div>
                         </div>
+                        <div class="form-group row">
+                            <label class="col-lg-3 col-form-label form-control-label">PIN:</label>
+                            <div class="col-lg-9">
+                                <input class="form-control" type="text" name="printerpin" maxlength="10" value="<%=Server.HTMLEncode(rs("printerpin") & "")%>" placeholder="e.g., 012345">
+                                <small class="form-text text-muted">Leading zeros are preserved</small>
+                            </div>
+                        </div>
                         <div class="form-group row">
                             <label class="col-lg-3 col-form-label form-control-label">Windows Name:</label>
                             <div class="col-lg-9">