Set CRM order status to PACKED after Checkbox accepts the receipt

- ExoCrmClient.set_status: live SetStatus needs {Orders: [id], Status} and
  replies per order, unlike the documented {ID, Status}
- receipts.crm_status_set_at (migration 0006); set right after creation,
  retried by cron, row-locked to avoid a repeat PACKED overwriting a newer status
- CRM errors under capitalized 'Errors' and non-JSON replies are reported

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/app/worker.py

@@ -3,7 +3,8 @@
 Запускается отдельным процессом: `arq app.worker.WorkerSettings`.
 - `create_ettn_receipt` — задача, которую ставит API после запроса кассира;
 - `poll_np_statuses` — раз в минуту статусы ТТН по заказам без чека;
-- `poll_receipts` — раз в минуту повтор зависших `pending` и статусы `created`-чеков.
+- `poll_receipts` — раз в минуту повтор зависших `pending`, статусы `created`-чеков
+  и повтор смены статуса заказа в CRM (PACKED), если CRM была недоступна.
 """
 
 from __future__ import annotations
@@ -19,6 +20,7 @@ from app.core.logging import configure_logging, get_logger
 from app.db.session import SessionFactory
 from app.services import receipts as receipts_service
 from app.services.checkbox.client import get_checkbox_client
+from app.services.crm.exo_client import ExoCrmClient
 from app.services.nova_poshta.np_client import NpTrackingClient
 from app.services.orders import sync_np_statuses
 
@@ -29,6 +31,7 @@ async def startup(ctx: dict[str, Any]) -> None:
     configure_logging()
     ctx["np_client"] = NpTrackingClient(settings)
     ctx["checkbox_client"] = get_checkbox_client()
+    ctx["crm_client"] = ExoCrmClient(settings)
     log.info("worker_starting", environment=settings.environment)
 
 
@@ -43,12 +46,15 @@ async def create_ettn_receipt(ctx: dict[str, Any], receipt_id: str) -> None:
         await receipts_service.create_ettn_for_receipt(
             session, ctx["checkbox_client"], uuid.UUID(receipt_id)
         )
+        # Чек принят Checkbox — сразу переводим заказ в CRM в PACKED.
+        await receipts_service.sync_crm_statuses(session, ctx["crm_client"])
 
 
 async def poll_receipts(ctx: dict[str, Any]) -> None:
     async with SessionFactory() as session:
         await receipts_service.retry_pending_receipts(session, ctx["checkbox_client"])
         await receipts_service.sync_ettn_statuses(session, ctx["checkbox_client"])
+        await receipts_service.sync_crm_statuses(session, ctx["crm_client"])
     log.info("receipts_polled")