add walnut creek and gary dashboards

README.md

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+# grafana-dashboards
+
+Grafana dashboard JSON files for Galion Systems client sites.
+
+Import via Grafana UI (Dashboards → Import → Upload JSON) or use the
+provisioning/ configs for automated deployment.
+
+## Sites
+- `walnut_creek/` — Walnut Creek Water Treatment Plant (OH)
+- `gary_in/` — Gary Indiana facility

dashboards/gary_in/compressor_status.json

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+{
+  "title": "Gary IN Facility - Compressor Status",
+  "uid": "gary-comp",
+  "version": 1,
+  "panels": [
+    {
+      "type": "timeseries",
+      "title": "Compressor Outlet Pressure",
+      "id": 1,
+      "targets": [{"expr": "modbus_holding{site=\"gary_in\",tag=\"comp_pressure_psi\"}"}]
+    }
+  ],
+  "time": {"from": "now-4h", "to": "now"},
+  "refresh": "1m"
+}

dashboards/walnut_creek/process_overview.json

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+{
+  "__inputs": [],
+  "__requires": [{"type": "grafana", "id": "grafana", "name": "Grafana", "version": "10.0.0"}],
+  "annotations": {"list": []},
+  "title": "Walnut Creek WTP - Process Overview",
+  "uid": "wc-proc-overview",
+  "version": 3,
+  "panels": [
+    {
+      "type": "gauge",
+      "title": "Influent Flow (GPM)",
+      "id": 1,
+      "targets": [{"expr": "modbus_holding{site=\"walnut_creek\",tag=\"flow_rate_gpm\"}"}],
+      "fieldConfig": {"defaults": {"min": 0, "max": 5000, "unit": "short"}}
+    },
+    {
+      "type": "stat",
+      "title": "Tank Level (ft)",
+      "id": 2,
+      "targets": [{"expr": "modbus_holding{site=\"walnut_creek\",tag=\"tank_level_ft\"}"}]
+    },
+    {
+      "type": "stat",
+      "title": "Pump 1 Status",
+      "id": 3,
+      "targets": [{"expr": "modbus_holding{site=\"walnut_creek\",tag=\"pump1_status\"}"}]
+    }
+  ],
+  "time": {"from": "now-1h", "to": "now"},
+  "refresh": "30s"
+}

provisioning/datasources/prometheus.yaml

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+apiVersion: 1
+datasources:
+  - name: Prometheus
+    type: prometheus
+    url: http://localhost:9090
+    isDefault: true