feat: update service report exports and calendar bulk downloads

Align service-record PDF/DOCX generation with task-level data and naming.

- Use Task.service_report_note as report note source
- Use Task.scheduled_date for service-record dates
- Rename per-task exports to MT...SN... format
- Add monthly SN/PN ZIP download endpoints with 7-day retention
- Add calendar 'Preuzmi sve' modal with both bulk download actions
- Prefill work-hours day/date from scheduled_date for empty tables
- Remove duplicate note table and clean extra DOCX page breaks

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/modules/fleet/urls.py

@@ -3,7 +3,7 @@ from django.urls import path
 from .views import (
     CraneViewSet, VehicleViewSet, WorkOrderViewSet, VehicleServiceRecordViewSet,
     WorkOrderInvoiceViewSet, ServiceContextNoteViewSet, VehicleNotificationViewSet, VehicleServicePhotoViewSet, VehicleServiceAttachmentViewSet, pusher_auth,
-    monthly_servicer_report_docx, monthly_costs_report_docx, MonthlyServicerDayEntryViewSet,
+    monthly_servicer_report_docx, monthly_costs_report_docx, monthly_service_tasks_archive, monthly_work_orders_archive, MonthlyServicerDayEntryViewSet,
 )
 
 router = DefaultRouter()
@@ -24,4 +24,6 @@ urlpatterns += [
     path('pusher-auth/', pusher_auth, name='pusher-auth'),
     path('reports/monthly-servicer/', monthly_servicer_report_docx, name='monthly-servicer-report'),
     path('reports/monthly-costs/', monthly_costs_report_docx, name='monthly-costs-report'),
+    path('reports/monthly-service-tasks-archive/', monthly_service_tasks_archive, name='monthly-service-tasks-archive'),
+    path('reports/monthly-work-orders-archive/', monthly_work_orders_archive, name='monthly-work-orders-archive'),
 ]