baseline: 批次A-D 成果 + membership 半成品（测试红）

backend/requirements.txt

@@ -0,0 +1,17 @@
+django==5.2.*
+djangorestframework==3.17.*
+adrf==0.1.*
+psycopg[binary]==3.2.*
+granian==2.8.*
+python-dateutil==2.9.*
+django-environ==0.14.*
+djangorestframework-simplejwt==5.*
+django-filter==25.*
+httpx==0.28.*
+dramatiq[redis]==1.17.*
+dramatiq-crontab==1.0.12
+whitenoise==6.7.*
+pytest==9.*
+pytest-asyncio==1.4.*
+pytest-django==4.*
+model-bakery==1.24.*