fix(dashboard): cache ROA price status and align nefacturate counts

- Add price_match column to SQLite, cached on order detail view
- Background backfill on startup checks all unchecked imported orders
- Extract _enrich_items_with_codmat() helper to deduplicate SKU enrichment
- Attention card now shows same nefacturate count as filter pill

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

api/app/services/sqlite_service.py

@@ -831,6 +831,20 @@ async def update_order_invoice(order_number: str, serie: str = None,
         await db.close()
 
 
+async def update_order_price_match(order_number: str, match: bool | None):
+    """Cache price_match result (True=OK, False=mismatch, None=unavailable)."""
+    db = await get_sqlite()
+    try:
+        val = None if match is None else (1 if match else 0)
+        await db.execute(
+            "UPDATE orders SET price_match = ?, updated_at = datetime('now') WHERE order_number = ?",
+            (val, order_number),
+        )
+        await db.commit()
+    finally:
+        await db.close()
+
+
 async def get_invoiced_imported_orders() -> list:
     """Get imported orders that HAVE cached invoice data (for re-verification)."""
     db = await get_sqlite()