Add priority flag to jobs

- Migration 0010: priority BOOLEAN NOT NULL DEFAULT 0 on print_jobs
- Priority jobs sort above normal jobs in the list
- Checkbox in Add Job modal; warning icon in list; badge on detail page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/templates/job_detail.html

@@ -10,6 +10,7 @@
     <div class="d-flex align-items-center gap-2">
       <h5 class="text-white mb-0">{{ job.file_name or job.name }}</h5>
       {% set s = job.status.value %}
+      {% if job.priority %}<span class="badge bg-warning text-dark"><i class="bi bi-exclamation-circle me-1"></i>Priority</span>{% endif %}
       {% if   s == 'printing'  %}<span class="badge bg-primary">printing</span>
       {% elif s == 'done'      %}<span class="badge bg-success">done</span>
       {% elif s == 'failed'    %}<span class="badge bg-danger">failed</span>

app/templates/jobs.html

@@ -30,6 +30,7 @@
   <table class="table table-dark table-hover mb-0 align-middle" style="font-size:.875rem">
     <thead>
       <tr class="text-secondary small">
+        <th class="fw-normal"></th>
         <th class="fw-normal">UUID</th>
         <th class="fw-normal">Customer</th>
         <th class="fw-normal">File</th>
@@ -42,6 +43,9 @@
     <tbody>
     {% for j in jobs %}
     <tr>
+      <td style="width:24px">
+        {% if j.priority %}<i class="bi bi-exclamation-circle-fill text-warning" title="Priority"></i>{% endif %}
+      </td>
       <td class="font-monospace text-secondary" style="font-size:.75rem">
         {{ j.job_uuid[:8] if j.job_uuid else '—' }}
       </td>
@@ -157,6 +161,13 @@
             </div>
           </div>
 
+          <div class="form-check form-switch mb-1">
+            <input class="form-check-input" type="checkbox" name="priority" id="priorityCheck" value="1">
+            <label class="form-check-label text-secondary small" for="priorityCheck">
+              <i class="bi bi-exclamation-circle text-warning me-1"></i>Priority
+            </label>
+          </div>
+
           <div class="row g-3">
             <div class="col-md-4">
               <label class="form-label text-secondary small">Amount</label>