fix: use task-specific service report context

Ensure service report DOCX/PDF headers and monthly ZIP archives use task/work-order context, with async fallback when the broker is unavailable.

backend/modules/fleet/tests/test_work_order_images_endpoint.py

@@ -9,7 +9,10 @@ import uuid
 from io import BytesIO
 from datetime import date, timedelta
 import zipfile
+from unittest.mock import patch
 from PIL import Image
+from pypdf import PdfReader
+from kombu.exceptions import OperationalError as KombuOperationalError
 
 from modules.fleet.models import (
     Vehicle,
@@ -324,6 +327,48 @@ class WorkOrderImagesEndpointTests(TestCase):
         self.assertNotIn('MT250226', header_xml)
         self.assertNotIn('LTM-1350', header_xml)
 
+    def test_task_specific_service_records_pdf_uses_task_header_values(self):
+        vehicle_two = Vehicle.objects.create(
+            asset_type='crane',
+            registration_number='WO-IMG-003',
+            make='Tadano',
+            model='ATF 120',
+            crane_serial_number='SN-456',
+            superstructure_working_hours=777,
+            chassis_working_hours=888,
+            current_mileage=99911,
+        )
+        work_order_two = WorkOrder.objects.create(
+            vehicle=vehicle_two,
+            creator=self.user,
+            display_code='MT170726',
+            purpose='kontrola',
+        )
+        task_two = Task.objects.create(
+            title='PDF kontekst task',
+            assigned_to=self.user,
+            vehicle=vehicle_two,
+            work_order=work_order_two,
+            scheduled_date=date(2033, 12, 27),
+        )
+
+        response = self.client.get(
+            f"/api/fleet/work-orders/{work_order_two.pk}/service-records-pdf/?task_id={task_two.pk}"
+        )
+        self.assertEqual(response.status_code, 200, response.content)
+        self.assertEqual(response['Content-Type'], 'application/pdf')
+
+        reader = PdfReader(BytesIO(response.content))
+        text = "\n".join((page.extract_text() or '') for page in reader.pages)
+        self.assertIn('Tadano', text)
+        self.assertIn('ATF 120', text)
+        self.assertIn('SN-456', text)
+        self.assertIn('777', text)
+        self.assertIn('888', text)
+        self.assertIn('99911', text)
+        self.assertIn('MT170726', text)
+        self.assertNotIn('MT150726', text)
+
     def test_monthly_service_tasks_archive_returns_zip_with_task_docx(self):
         response = self.client.get('/api/fleet/reports/monthly-service-tasks-archive/?year=2033&month=12')
         self.assertEqual(response.status_code, 200, response.content)
@@ -485,6 +530,33 @@ class WorkOrderImagesEndpointTests(TestCase):
         self.assertFalse(stale.is_active)
         self.assertEqual(stale.status, 'failed')
 
+    def test_monthly_service_tasks_archive_request_uses_async_local_fallback_when_broker_unavailable(self):
+        with (
+            patch('modules.fleet.views.build_monthly_archive_cached_task.delay', side_effect=KombuOperationalError('broker-down')),
+            patch('modules.fleet.views._schedule_monthly_archive_local_fallback') as fallback_mock,
+        ):
+            response = self.client.post(
+                '/api/fleet/reports/monthly-service-tasks-archive-request/',
+                data={'year': 2033, 'month': 12},
+                format='json',
+            )
+        self.assertEqual(response.status_code, 202, response.content)
+        fallback_mock.assert_called_once()
+
+        generated = (
+            GeneratedFleetArchive.objects
+            .filter(
+                requested_by=self.user,
+                archive_type='service_tasks',
+                year=2033,
+                month=12,
+            )
+            .order_by('-created_at')
+            .first()
+        )
+        self.assertIsNotNone(generated)
+        self.assertEqual(generated.status, 'pending')
+
     def test_monthly_work_orders_archive_request_creates_ready_download_with_notification(self):
         WorkOrderInvoice.objects.create(
             work_order=self.work_order,