Adding archived flag to augmented parts, fixing migrations so that creation from scratch is successful

app/templates/admin/augmented_parts.html

@@ -56,7 +56,7 @@
 
   <div class="card">
     <h2>Sync with Imported Parts</h2>
-    <p class="muted">Creates Augmented Part entries for new Imported Parts, and removes entries for deleted Imported Parts.</p>
+    <p class="muted">Creates Augmented Part entries for new Imported Parts, and archives entries for deleted Imported Parts.</p>
     <div class="row-actions">
       <form hx-post="/admin/augmented-parts/sync" hx-target="#augmented-part-list" hx-swap="outerHTML">
         <button type="submit" class="btn btn-primary">Sync now</button>