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aitbc/apps/blockchain-node/observability/grafana-dashboard.json
oib d98b2c7772 Based on the repository's commit message style and the changes in the diff, here's an appropriate commit message: 
```
feat: add websocket tests, PoA metrics, marketplace endpoints, and enhanced observability

- Add comprehensive websocket tests for blocks and transactions streams including multi-subscriber and high-volume scenarios
- Extend PoA consensus with per-proposer block metrics and rotation tracking
- Add latest block interval gauge and RPC error spike alerting
- Enhance mock coordinator
2025-12-22 07:55:09 +01:00

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{
"annotations": {
"list": [
{
"builtIn": 1,
"datasource": {
"type": "grafana",
"uid": "grafana"
},
"enable": true,
"hide": true,
"iconColor": "rgba(0, 211, 255, 1)",
"name": "Annotations & Alerts",
"type": "dashboard"
}
]
},
"description": "AITBC devnet observability for blockchain node, coordinator, and miner mock.",
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"gnetId": null,
"graphTooltip": 0,
"id": null,
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"options": {
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"legendFormat": "submitReceipt",
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"expr": "label_replace(sum(rate({__name__=~\"poa_blocks_proposed_total_.*\"}[5m])) by (__name__), \"proposer\", \"$1\", \"__name__\", \"poa_blocks_proposed_total_(.*)\")",
"legendFormat": "{{proposer}}",
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}
],
"title": "Blocks Proposed per Proposer (5m rate)",
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}
],
"refresh": "10s",
"schemaVersion": 39,
"style": "dark",
"tags": [
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"templating": {
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"time": {
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"timepicker": {},
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"title": "AITBC Blockchain Node",
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