force dag_run values to be string

csst_dag/dag/_base_dag.py

@@ -162,6 +162,12 @@ class BaseDAG:
             priority=priority,
         )
 
+    @staticmethod
+    def force_string(d: dict):
+        for k, v in d.items():
+            d.__setattr__(k, str(v))
+        return d
+
     def gen_dag_run(self, **kwargs) -> dict:
         """Generate a complete DAG run message.
 
@@ -189,6 +195,8 @@ class BaseDAG:
             dag_run,
             {"dag": self.dag, "dag_run": self.generate_sha1()},
         )
+        # force values to be string
+        dag_run = self.force_string(dag_run)
         return dag_run
 
     @staticmethod