style: apply ruff formatting to all backend files

backend/graph/audit_logs.py

@@ -9,10 +9,7 @@ def fetch_audit_logs(hours: int = 24, since: str | None = None, max_pages: int =
     """Fetch paginated directory audit logs from Microsoft Graph and enrich with resolved names."""
     token = get_access_token()
     start_time = since or (datetime.utcnow() - timedelta(hours=hours)).isoformat() + "Z"
-    next_url = (
-        "https://graph.microsoft.com/v1.0/"
-        f"auditLogs/directoryAudits?$filter=activityDateTime ge {start_time}"
-    )
+    next_url = f"https://graph.microsoft.com/v1.0/auditLogs/directoryAudits?$filter=activityDateTime ge {start_time}"
     headers = {"Authorization": f"Bearer {token}"}
 
     events = []

backend/graph/resolve.py

@@ -1,4 +1,3 @@
-
 from utils.http import get_with_retry
 
 
@@ -48,7 +47,10 @@ def resolve_directory_object(object_id: str, token: str, cache: dict[str, dict])
 
     probes = [
         ("user", f"https://graph.microsoft.com/v1.0/users/{object_id}?$select=id,displayName,userPrincipalName,mail"),
-        ("servicePrincipal", f"https://graph.microsoft.com/v1.0/servicePrincipals/{object_id}?$select=id,displayName,appId,appDisplayName"),
+        (
+            "servicePrincipal",
+            f"https://graph.microsoft.com/v1.0/servicePrincipals/{object_id}?$select=id,displayName,appId,appDisplayName",
+        ),
         ("group", f"https://graph.microsoft.com/v1.0/groups/{object_id}?$select=id,displayName,mail"),
         ("device", f"https://graph.microsoft.com/v1.0/devices/{object_id}?$select=id,displayName"),
     ]
@@ -82,12 +84,7 @@ def resolve_service_principal_owners(sp_id: str, token: str, cache: dict[str, li
     )
     payload = _request_json(url, token)
     for owner in (payload or {}).get("value", []):
-        name = (
-            owner.get("displayName")
-            or owner.get("userPrincipalName")
-            or owner.get("mail")
-            or owner.get("id")
-        )
+        name = owner.get("displayName") or owner.get("userPrincipalName") or owner.get("mail") or owner.get("id")
         if name:
             owners.append(name)