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>

adddevice.asp

@@ -31,7 +31,7 @@
             <div class="card-body">
               <div style="display:flex; justify-content:space-between; align-items:center; margin-bottom:20px;">
                 <h5 class="card-title" style="margin:0;">
-                  <i class="zmdi zmdi-laptop"></i> Add Device - Scan Serial Number
+                  <i class="zmdi zmdi-laptop"></i> Add PC - Scan Serial Number
                 </h5>
                 <a href="./displaypcs.asp" class="btn btn-sm btn-secondary">
                   <i class="zmdi zmdi-arrow-left"></i> Back to PCs
@@ -72,7 +72,7 @@ End If
                   </div>
                   <div class="text-center" id="manualSubmit" style="display:none;">
                     <button type="submit" class="btn btn-primary">
-                      <i class="zmdi zmdi-check"></i> Add Device
+                      <i class="zmdi zmdi-check"></i> Add PC
                     </button>
                   </div>
                 </form>
@@ -80,7 +80,7 @@ End If
 
               <div id="successArea" style="display:none;">
                 <div class="alert alert-success" style="padding:0.75rem 1.25rem;">
-                  <strong>Device added successfully!</strong>
+                  <strong>PC added successfully!</strong>
                   <div style="margin-top:10px; font-size:20px; font-family:monospace; letter-spacing:1px;" id="addedSerial"></div>
                 </div>
                 <div class="text-center" style="margin-top:20px;">