Task: Update people through Zulip about open tickets in Zammad

n8n workflow JSON:
{"id":4,"name":"Zammad Open Tickets","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[-40,340],"parameters":{},"typeVersion":1},{"name":"Ticket Filtering","type":"n8n-nodes-base.function","notes":"Filter tickets by status.","position":[400,460],"parameters":{"functionCode":"let newTickets = 0\nlet openTickets = 0\nlet pendingReminder = 0\nlet pendingClose = 0\n\nfor (let i = 0; i < items.length; i++) {\n  const ticket = items[i]\n  if (ticket.json.state_id === 1) {\n    newTickets++\n  }\n  if (ticket.json.state_id === 2) {\n    openTickets++\n  }\n  if (ticket.json.state_id === 3) {\n    pendingReminder++\n  }\n  if (ticket.json.state_id === 7) {\n    pendingClose++\n  }\n}\n\nreturn [{\n  json: {\n    \"new\": newTickets,\n    open: openTickets,\n    pendingReminder: pendingReminder,\n    pendingClose: pendingClose\n  }\n}];"},"executeOnce":true,"notesInFlow":true,"typeVersion":1},{"name":"List Tickets","type":"n8n-nodes-base.zammad","notes":"Get all tickets.","position":[200,460],"parameters":{"resource":"ticket","operation":"getAll","returnAll":true},"credentials":{"zammadTokenAuthApi":{"id":"7","name":"Zammad Token Auth account"}},"notesInFlow":true,"typeVersion":1},{"name":"Notify for Standup","type":"n8n-nodes-base.zulip","notes":"Sends a summary to customer support stream.","position":[580,460],"parameters":{"topic":"=tickets","stream":"=customer support","content":"=:ticket: Support Tickets Summary:\n* Open: {{$node[\"Ticket Filtering\"].json[\"open\"]}}\n* New:{{$node[\"Ticket Filtering\"].json[\"new\"]}}\n* Pending Close {{$node[\"Ticket Filtering\"].json[\"pendingClose\"]}}\n* Pending Reminder {{$node[\"Ticket Filtering\"].json[\"pendingReminder\"]}}","operation":"sendStream"},"credentials":{"zulipApi":{"id":"1","name":"Zulip n8n Bot"}},"executeOnce":true,"notesInFlow":true,"typeVersion":1},{"name":"Standup Cron","type":"n8n-nodes-base.cron","notes":"Daily stand-up open days.","position":[-40,560],"parameters":{"triggerTimes":{"item":[{"mode":"custom","cronExpression":"0 30 8 * * 1-5"}]}},"executeOnce":true,"notesInFlow":true,"typeVersion":1}],"active":true,"settings":{},"connections":{"List Tickets":{"main":[[{"node":"Ticket Filtering","type":"main","index":0}]]},"Standup Cron":{"main":[[{"node":"List Tickets","type":"main","index":0}]]},"Ticket Filtering":{"main":[[{"node":"Notify for Standup","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"List Tickets","type":"main","index":0}]]}}}