Apply mitigations for piling up open connections

- Because we're using a FastAPI api framework with a Django ORM, we're running into some interesting conditions around connection pooling and clean-up. We're ending up with a large pile-up of open, stale connections to the DB recurringly when the server has been running for a while. To mitigate this problem, given starlette and django run in different python threads, add a middleware that will go and call the connection clean up method in each of the threads.

pyproject.toml

@@ -65,7 +65,7 @@ dependencies = [
     "tenacity == 8.3.0",
     "anyio == 3.7.1",
     "pymupdf >= 1.23.5",
-    "django == 4.2.11",
+    "django == 5.0.6",
     "authlib == 1.2.1",
     "llama-cpp-python == 0.2.76",
     "itsdangerous == 2.1.2",