✨(backend) configure lasuite.malware_detection module

We want to use the malware_detection module from lasuite library. We add
a new setting MALWARE_DETECTION to configure the backend we want to use.
The callback is also added. It removes the file if it is not safe or
change it's status in the metadata to set it as ready.

src/backend/impress/settings.py

@@ -317,6 +317,7 @@ class Base(Configuration):
         "django.contrib.staticfiles",
         # OIDC third party
         "mozilla_django_oidc",
+        "lasuite.malware_detection",
     ]
 
     # Cache
@@ -680,6 +681,21 @@ class Base(Configuration):
         },
     }
 
+    MALWARE_DETECTION = {
+        "BACKEND": values.Value(
+            "lasuite.malware_detection.backends.dummy.DummyBackend",
+            environ_name="MALWARE_DETECTION_BACKEND",
+            environ_prefix=None,
+        ),
+        "PARAMETERS": values.DictValue(
+            default={
+                "callback_path": "core.malware_detection.malware_detection_callback",
+            },
+            environ_name="MALWARE_DETECTION_PARAMETERS",
+            environ_prefix=None,
+        ),
+    }
+
     API_USERS_LIST_LIMIT = values.PositiveIntegerValue(
         default=5,
         environ_name="API_USERS_LIST_LIMIT",