Archive fix-vinograd-dashboard-datasource: убрана ссылка на __grafana__ в annotations дашборда vinograd-wan (Datasource not found)

openspec/specs/vinograd-wan-monitoring/spec.md

@@ -60,3 +60,25 @@ The system MUST provide a Grafana dashboard "Vinograd WAN" with:
 - GIVEN Grafana has the Vinograd WAN dashboard provisioned
 - WHEN a user opens it
 - THEN it shows the RTT graph and availability of both channel addresses
+
+### Requirement: Vinograd WAN dashboard opens without datasource errors
+
+The Vinograd WAN dashboard (`/d/vinograd-wan/vinograd-wan`) MUST open and render
+all panels WITHOUT the error "Datasource __grafana__ was not found".
+
+- The dashboard JSON MUST NOT reference the built-in `__grafana__` datasource in
+  its `annotations.list` (it is not registered in this Grafana's database).
+- `annotations.list` MUST be empty (`[]`), matching the working
+  `garage-cluster.json` dashboard.
+
+#### Scenario: Dashboard renders without datasource error
+
+- **WHEN** a user opens `https://grafana.nixg.ru/d/vinograd-wan/vinograd-wan`
+- **THEN** the dashboard loads without the error "Datasource __grafana__ was not found"
+- **AND** all panels render metric data from Prometheus (`uid: Prometheus`)
+
+#### Scenario: Dashboard file stores no __grafana__ reference
+
+- **WHEN** the file `grafana/dashboards/vinograd-wan.json` is parsed
+- **THEN** `annotations.list` is `[]` OR contains no item whose
+  `datasource.uid` equals `__grafana__`