data: record all remaining NOT_FOUND names as explicit null overrides

Every queried name now resolves 447/447. Adds 23 explicit null
overrides so squatters can never silently attach a PyPI number to
these names later: stdlib-named entries (concurrent-futures, difflib,
mimetypes, sqlite3, tkinter, tomllib, zoneinfo), interpreters
(micropython, pypy), monorepo umbrellas (azure-sdk-for-python,
google-cloud-python), self-hosted or distro-installed projects (odoo,
cloud-init, warehouse), GitHub-only projects (thealgorithms,
geodjango, django-db-models, django-ai-plugins, graphify,
sentry-skills, social-engineer-toolkit, trailofbits-skills), and
httpx-url (a class within httpx, not a package).

Caveat: graphify and django-ai-plugins are young projects that may
legitimately publish to PyPI later — flip their null to a remap
during a future audit if they do.

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

website/data/pypi_name_overrides.json

@@ -1,19 +1,42 @@
 {
   "autobahn-python": "autobahn",
+  "azure-sdk-for-python": null,
+  "cloud-init": null,
+  "concurrent-futures": null,
   "cpython": null,
   "devpi": "devpi-server",
+  "difflib": null,
+  "django-ai-plugins": null,
+  "django-db-models": null,
   "django-rest-framework": "djangorestframework",
   "django-rules": "rules",
   "fasthtml": "python-fasthtml",
+  "geodjango": null,
+  "google-cloud-python": null,
+  "graphify": null,
+  "httpx-url": null,
   "jinja": "jinja2",
   "mem0": "mem0ai",
+  "micropython": null,
+  "mimetypes": null,
+  "odoo": null,
   "pangu-py": "pangu",
   "playwright-python": "playwright",
   "pyenv": null,
+  "pypy": null,
   "python-patterns": null,
   "pytorch": "torch",
   "renpy": null,
+  "sentry-skills": null,
+  "social-engineer-toolkit": null,
+  "sqlite3": null,
   "strawberry": "strawberry-graphql",
   "strawberry-django": "strawberry-graphql-django",
-  "winpython": null
+  "thealgorithms": null,
+  "tkinter": null,
+  "tomllib": null,
+  "trailofbits-skills": null,
+  "warehouse": null,
+  "winpython": null,
+  "zoneinfo": null
 }