feat(sync): handle cancelled GoMag orders (status Anulata / statusId 7)

- Add web_status column to orders table (generic name for platform status)
- Filter cancelled orders during sync, record as CANCELLED in SQLite
- Soft-delete previously-imported cancelled orders in Oracle (if not invoiced)
- Add CANCELLED filter pill + badge in dashboard UI
- New soft_delete_order_in_roa() and mark_order_cancelled() functions

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

api/app/templates/dashboard.html

@@ -69,6 +69,7 @@
           <button class="filter-pill d-none d-md-inline-flex" data-status="ERROR">Erori <span class="filter-count fc-red" id="cntErr">0</span></button>
           <button class="filter-pill d-none d-md-inline-flex" data-status="INVOICED">Facturate <span class="filter-count fc-green" id="cntFact">0</span></button>
           <button class="filter-pill d-none d-md-inline-flex" data-status="UNINVOICED">Nefacturate <span class="filter-count fc-red" id="cntNef">0</span></button>
+          <button class="filter-pill d-none d-md-inline-flex" data-status="CANCELLED">Anulate <span class="filter-count fc-dark" id="cntCanc">0</span></button>
           <button class="btn btn-sm btn-outline-secondary d-none d-md-inline-flex align-items-center gap-1" id="btnRefreshInvoices" onclick="refreshInvoices()" title="Actualizeaza status facturi din Oracle">&#8635; Facturi</button>
           <!-- Search (integrated, end of row) -->
           <input type="search" id="orderSearch" placeholder="Cauta..." class="search-input">
@@ -199,5 +200,5 @@
 {% endblock %}
 
 {% block scripts %}
-<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=13"></script>
+<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=14"></script>
 {% endblock %}