feat(sqlite): refactor orders schema + dashboard period filter

Replace import_orders (insert-per-run) with orders table (one row per
order, upsert on conflict). Eliminates dedup CTE on every dashboard
query and prevents unbounded row growth at 4-500 orders/sync.

Key changes:
- orders table: PK order_number, upsert via ON CONFLICT DO UPDATE;
  COALESCE preserves id_comanda once set; times_skipped auto-increments
- sync_run_orders: lightweight junction (sync_run_id, order_number)
  replaces sync_run_id column on orders
- order_items: PK changed to (order_number, sku), INSERT OR IGNORE
- Auto-migration in init_sqlite(): import_orders → orders on first boot,
  old table renamed to import_orders_bak
- /api/dashboard/orders: period_days param (3/7/30/0=all, default 7)
- Dashboard: period selector buttons in orders card header
- start.sh: stop existing process on port 5003 before restart;
  remove --reload (broken on WSL2 /mnt/e/)
- Add invoice_service, E2E Playwright tests, Oracle package updates

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

api/app/services/article_service.py

@@ -15,10 +15,11 @@ def search_articles(query: str, limit: int = 20):
     with database.pool.acquire() as conn:
         with conn.cursor() as cur:
             cur.execute("""
-                SELECT id_articol, codmat, denumire
+                SELECT id_articol, codmat, denumire, um
                 FROM nom_articole
                 WHERE (UPPER(codmat) LIKE UPPER(:q) || '%'
                     OR UPPER(denumire) LIKE '%' || UPPER(:q) || '%')
+                AND sters = 0 AND inactiv = 0
                 AND ROWNUM <= :lim
                 ORDER BY CASE WHEN UPPER(codmat) LIKE UPPER(:q) || '%' THEN 0 ELSE 1 END, codmat
             """, {"q": query, "lim": limit})