fix(cron): sanitize migrated legacy metadata

nanobot/cron/service.py

@@ -153,7 +153,7 @@ def _normalize_agent_turn_job(job: CronJob) -> bool:
     payload.origin_channel = payload.origin_channel or payload.channel
     payload.origin_chat_id = payload.origin_chat_id or payload.to
     if not payload.origin_metadata:
-        payload.origin_metadata = dict(payload.channel_meta or {})
+        payload.origin_metadata = _persistable_origin_metadata(payload.channel_meta or {})
 
     payload.deliver = False
     payload.channel = None

tests/cron/test_cron_service.py

@@ -293,7 +293,12 @@ def test_load_store_migrates_legacy_delivery_context(tmp_path) -> None:
                             "deliver": True,
                             "channel": "telegram",
                             "to": "user-1",
-                            "channelMeta": {"message_thread_id": 42},
+                            "channelMeta": {
+                                "message_thread_id": 42,
+                                RUNTIME_CONTEXT_INPUT_META: [
+                                    {"source": "webui_quote", "content": "stale quote"}
+                                ],
+                            },
                             "sessionKey": "telegram:user-1:topic:42",
                         },
                         "state": {},