Move to pymongo async (#1)

* Update app.py

* Update requirements.txt

* Update requirements.in

* remove dev-req files

* update pymongo version

Author: rachel-mack

requirements.txt

@@ -30,7 +30,7 @@ pydantic==2.6.3
     #   fastapi
 pydantic-core==2.16.3
     # via pydantic
-pymongo==4.5.0
+pymongo==4.13.1
     # via motor
 sniffio==1.3.0
     # via anyio