Add persistent job run queue

tests/test_model.py

@@ -169,6 +169,40 @@ def test_initialize_database_creates_scheduler_and_execution_indexes(
         connection.close()
 
 
+def test_initialize_database_creates_run_queue_indexes(tmp_path: Path) -> None:
+    db_path = tmp_path / "queue-indexes.db"
+
+    initialize_database(db_path)
+
+    connection = sqlite3.connect(db_path)
+    try:
+        indexes = {
+            row[0]: row[1]
+            for row in connection.execute(
+                """
+                SELECT name, sql
+                FROM sqlite_master
+                WHERE type = 'index'
+                  AND name IN (
+                    'job_execution_pending_created_at_idx',
+                    'job_execution_pending_unique_job_idx'
+                  )
+                """
+            )
+        }
+        assert set(indexes) == {
+            "job_execution_pending_created_at_idx",
+            "job_execution_pending_unique_job_idx",
+        }
+        assert indexes["job_execution_pending_unique_job_idx"] is not None
+        assert (
+            "WHERE running_status = 0"
+            in indexes["job_execution_pending_unique_job_idx"]
+        )
+    finally:
+        connection.close()
+
+
 def test_job_table_allows_exactly_one_job_per_source(tmp_path: Path) -> None:
     initialize_database(tmp_path / "jobs.db")