feat(safety): price comparison on order detail

Add ROA price comparison to order detail modal — operators can now see
if GoMag prices match Oracle before invoicing. Eliminates the #1 risk
of invoicing with wrong prices.

Backend:
- New get_prices_for_order() in validation_service.py — batch Oracle
  query with dual-policy routing (sales/production by cont 341/345),
  PRETURI_CU_TVA handling, kit total calculation
- Extend GET /api/sync/order/{orderNumber} with per-item pret_roa and
  order-level price_check summary
- GET /api/dashboard/orders returns price_match=null (lightweight)

Frontend:
- Modal: price check badge (green/red/grey), "Pret GoMag" + "Pret ROA"
  columns, match dot per row, mismatch rows highlighted
- Dashboard: price dot column (₽) in orders table
- Mobile: inline mismatch indicator

Cache-bust: shared.js?v=16, dashboard.js?v=28

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/app/templates/base.html

@@ -96,7 +96,7 @@
                         <div class="col-md-6">
                             <small class="text-muted">Client:</small> <strong id="detailCustomer"></strong><br>
                             <small class="text-muted">Data comanda:</small> <span id="detailDate"></span><br>
-                            <small class="text-muted">Status:</small> <span id="detailStatus"></span>
+                            <small class="text-muted">Status:</small> <span id="detailStatus"></span><span id="detailPriceCheck" class="ms-2"></span>
                         </div>
                         <div class="col-md-6">
                             <small class="text-muted">ID Comanda ROA:</small> <span id="detailIdComanda">-</span><br>
@@ -117,9 +117,11 @@
                                     <th>Produs</th>
                                     <th>CODMAT</th>
                                     <th class="text-end">Cant.</th>
-                                    <th class="text-end">Pret</th>
+                                    <th class="text-end">Pret GoMag</th>
+                                    <th class="text-end">Pret ROA</th>
                                     <th class="text-end">TVA%</th>
                                     <th class="text-end">Valoare</th>
+                                    <th class="text-center">✓</th>
                                 </tr>
                             </thead>
                             <tbody id="detailItemsBody">
@@ -140,7 +142,7 @@
 
     <script>window.ROOT_PATH = "{{ rp }}";</script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
-    <script src="{{ rp }}/static/js/shared.js?v=15"></script>
+    <script src="{{ rp }}/static/js/shared.js?v=16"></script>
     <script>
     // Dark mode toggle
     function toggleDarkMode() {