feat(sidechats): headless gateway new channel auto-provisioning and dedicated heartbeat channel

jobs/box-http-health.json

@@ -2,7 +2,6 @@
   "agent": "646",
   "chain_next": null,
   "description": "Box HTTP endpoint health \u2014 every 15 minutes",
-  "dm_target": "646 tasks",
   "followup": {
     "escalate": "opm",
     "expect_reply": true,
@@ -15,7 +14,9 @@
   "prompt_template": "Box HTTP health check.\nJob ID: {job_id}\nTime: {datetime}\n\nRun the Box HTTP checks on the VM:\n  ssh dev-operator-646@34.139.37.135 \"/srv/box/bin/box-health-check.sh http\"\n(or run /srv/box/bin/box-health-check.sh http via any VM access you have)\n\nAlso verify the new live Box Console endpoints:\n1. https://box.muse-dev.online/ (Front-Door Console loads, assets box.js and box.css return 200)\n2. https://box.muse-dev.online/api/box/fleet (Returns 200 with live fleet array)\n3. https://box.muse-dev.online/api/box/dm/log (Returns 200 with recent DM log entries)\n\nExpected: all OK. If any FAIL, investigate immediately (check board.service,\nCaddy, recent deploys) and include the failure lines in your reply.\n\nReply with OK or FAIL <one-line summary>.",
   "schedule": "*/15 * * * *",
   "sidechat": {
-    "create": false
+    "create": true,
+    "name_template": "box-http-health",
+    "reuse_key": "box-http-health"
   },
   "timeout": 600
 }