Use explicit join in random-jobs endpoint to avoid potential N+1 query

- Changed from using scalars().all() with lazy='joined' relationship
- Now uses explicit join similar to other audit endpoints
- Guarantees single query regardless of SQLAlchemy async behavior

backend/routes/audit.py

@@ -124,20 +124,25 @@ async def get_random_job_outcomes(
     _current_user: User = Depends(require_permission(Permission.VIEW_AUDIT)),
 ) -> list[RandomNumberOutcomeResponse]:
     """Get all random number job outcomes, newest first."""
-    query = select(RandomNumberOutcome).order_by(desc(RandomNumberOutcome.created_at))
+    # Explicit join to avoid N+1 query
+    query = (
+        select(RandomNumberOutcome, User.email)
+        .join(User, RandomNumberOutcome.triggered_by_user_id == User.id)
+        .order_by(desc(RandomNumberOutcome.created_at))
+    )
     result = await db.execute(query)
-    outcomes = result.scalars().all()
+    rows = result.all()
 
     return [
         RandomNumberOutcomeResponse(
             id=outcome.id,
             job_id=outcome.job_id,
             triggered_by_user_id=outcome.triggered_by_user_id,
-            triggered_by_email=outcome.triggered_by.email,
+            triggered_by_email=email,
             value=outcome.value,
             duration_ms=outcome.duration_ms,
             status=outcome.status,
             created_at=outcome.created_at,
         )
-        for outcome in outcomes
+        for outcome, email in rows
     ]