feat: add stage 0 foundation

backend/config/urls.py

@@ -0,0 +1,15 @@
+from django.contrib import admin
+from django.urls import path
+from ninja import NinjaAPI
+
+from apps.audit.api import router as audit_router
+from apps.system.api import router as system_router
+
+api = NinjaAPI(title="AI Ticket Platform API", version="0.1.0")
+api.add_router("/system", system_router)
+api.add_router("/audit", audit_router)
+
+urlpatterns = [
+    path("admin/", admin.site.urls),
+    path("api/", api.urls),
+]