harness: paperless-ngx box fixture — Django's own createsuperuser

manage.py in paperless-webserver's WORKDIR, python3 on PATH; measured on 9202 (a username that cannot exist reads False) before the line was written.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

scripts/upgrade_fixtures_box.py

@@ -1078,6 +1078,10 @@ FIXTURES = {
     "adventurelog": Django("adventurelog", "travel", "/admin/login/"),
     "tandoor": Django("tandoor", "recipes", "/accounts/login/",
                       python="/opt/recipes/venv/bin/python", workdir="/opt/recipes"),
+    # 2026-09-26 (version-travel Part B): paperless-ngx is Django too — `manage.py` in its WORKDIR
+    # (/usr/src/paperless/src), python3 on PATH; measured on 9202 (the readback answered False for a
+    # username that cannot exist) before this line was written.
+    "paperless-ngx": Django("paperless-webserver", "paperless", "/accounts/login/"),
     "privatebin": PrivateBin(),
     "docmost": Docmost(),
     "bookstack": BookStack(),