feat(partner-portal): Sprint 2 — partner-me events CRUD endpoints

Add partner-scoped event endpoints under /api/v1/partners/me/events/:
- GET/POST  /partners/me/events/            → list + create
- GET/PATCH/DELETE /partners/me/events/{pk}/ → detail + update + delete
- POST /partners/me/events/{pk}/duplicate/   → clone as draft

All endpoints enforce partner ownership via _require_owned_event().
Create auto-sets partner FK + source='partner'. Duplicate always
resets status to 'created' (draft).

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

admin_api/urls.py

@@ -26,6 +26,10 @@ urlpatterns = [
     path('partners/me/notifications/', views.PartnerMeNotificationsView.as_view(), name='partner-me-notifications'),
     path('partners/me/payout/', views.PartnerMePayoutView.as_view(), name='partner-me-payout'),
     path('partners/me/change-password/', views.PartnerMeChangePasswordView.as_view(), name='partner-me-change-password'),
+    # Partner-Me: events (Sprint 2)
+    path('partners/me/events/', views.PartnerMeEventsView.as_view(), name='partner-me-events'),
+    path('partners/me/events/<int:pk>/', views.PartnerMeEventDetailView.as_view(), name='partner-me-event-detail'),
+    path('partners/me/events/<int:pk>/duplicate/', views.PartnerMeEventDuplicateView.as_view(), name='partner-me-event-duplicate'),
     path('users/metrics/', views.UserMetricsView.as_view(), name='user-metrics'),
     path('users/', views.UserListView.as_view(), name='user-list'),
     path('users/<int:pk>/', views.UserDetailView.as_view(), name='user-detail'),