Fix cursor fetch query

src/saturn_engine/stores/jobs_store.py

@@ -189,21 +189,15 @@ def fetch_cursors_states(
 ) -> CursorsStates:
     # Generate a query for each jobs so we can UNION them.
     fetch_stmts = []
+    jobs = session.execute(
+        select(Job.name, Job.job_definition_name).where(Job.name.in_(query.keys()))
+    ).all()
+    job_names = {j.name: j.job_definition_name for j in jobs}
     for job, cursors in query.items():
+        job_name = job_names.get(job) or job
         fetch_stmts.append(
-            select(JobCursorState, sa.func.coalesce(Job.name, job).label("name"))
-            .join(
-                Job,
-                Job.job_definition_name == JobCursorState.job_definition_name,
-                isouter=True,
-            )
-            .where(
-                sa.or_(
-                    Job.name == job,
-                    sa.and_(
-                        Job.name.is_(None), JobCursorState.job_definition_name == job
-                    ),
-                ),
+            select(JobCursorState, sa.literal(job).label("name")).where(
+                JobCursorState.job_definition_name == job_name,
                 JobCursorState.cursor.in_(cursors),
             )
         )