Updates to Python packages

* Bump boto3 version
* Add moto dependency

Author: jerome-white

backend/pyproject.toml

@@ -21,7 +21,8 @@ dependencies = [
     "pydantic-settings<3.0.0,>=2.2.1",
     "sentry-sdk[fastapi]<2.0.0,>=1.40.6",
     "pyjwt<3.0.0,>=2.8.0",
-    "boto3>1.37.14"
+    "boto3>=1.37.20",
+    "moto[s3]>=5.1.1",
 ]
 
 [tool.uv]