Fix OTP/SMS, ledger accounting, order tracking, and add reviews app

- Add MessageTemplate.runtime_field_labels so mobile's per-field
  execution-time labels are actually persisted (were silently dropped)
- Fix AdvanceOrderStageView reading the wrong extra-input key, and be
  honest about SMS send failures instead of always claiming success
- Add admin gift-gem SMS notification via Kavenegar
- Post real double-entry Transactions for plain (non-invoice) ledger
  entries so trial balance, the معین screen, and CSV/XLSX exports
  actually include everyday income/expense entries; backfill existing
  historical entries via data migration
- Rewrite CSV ledger export to produce an actual دفتر معین structure
  (per-account running balance) instead of a flat row dump
- Add invoice percent/promotional discounts, tax presets, ledger
  discount-percent handling, product SKU/category/expiry fields, and
  manual ledger-book archiving (replacing auto-archive on new book)
- Add reviews app (models, API, admin) for the comments/reviews feature
- Update tests for the above; fix two stale assertions left over from
  earlier work in this branch (معین sheet name, book auto-close)

apps/orders/urls.py

@@ -2,6 +2,7 @@ from django.urls import path
 
 from .api.views import (
     AdvanceOrderStageView,
+    GenerateOrderTrackingCodeView,
     OrderDetailView,
     OrderListCreateView,
     OrderStageDetailView,
@@ -16,5 +17,10 @@ urlpatterns = [
     path("orders/", OrderListCreateView.as_view(), name="order-list"),
     path("orders/<str:pk>/", OrderDetailView.as_view(), name="order-detail"),
     path("orders/<str:pk>/advance/", AdvanceOrderStageView.as_view(), name="order-advance"),
+    path(
+        "orders/<str:pk>/generate-tracking-code/",
+        GenerateOrderTrackingCodeView.as_view(),
+        name="order-generate-tracking-code",
+    ),
     path("orders/<str:pk>/logs/", OrderStageLogListView.as_view(), name="order-logs"),
 ]