feat: split Grafana dashboards into per-folder ConfigMaps

Replace monolithic dashboards-configmap.yaml with 10 dedicated files,
one per Grafana folder: Ingress, Observability, Infrastructure, Storage,
Identity, DevTools, Search, Media, La Suite, Communications.

New dashboards for Longhorn, PostgreSQL/CNPG, Cert-Manager, SeaweedFS,
Hydra, Kratos, Gitea, OpenSearch, LiveKit, La Suite golden signals
(Linkerd metrics), Matrix, and Email Pipeline.

base/monitoring/dashboards-storage.yaml

@@ -0,0 +1,163 @@
+# Grafana dashboard ConfigMaps — Storage
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: grafana-dashboard-seaweedfs
+  namespace: monitoring
+  labels:
+    grafana_dashboard: "1"
+  annotations:
+    grafana_folder: "Storage"
+data:
+  seaweedfs.json: |
+    {
+      "annotations": { "list": [] },
+      "editable": true,
+      "panels": [
+        {
+          "title": "Cluster Overview",
+          "type": "row",
+          "gridPos": { "h": 1, "w": 24, "x": 0, "y": 0 },
+          "collapsed": false
+        },
+        {
+          "title": "Data Nodes",
+          "type": "stat",
+          "gridPos": { "h": 4, "w": 8, "x": 0, "y": 1 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "seaweedfs_master_data_nodes or count(up{job=~\".*seaweedfs-volume.*\"})",
+              "legendFormat": "nodes"
+            }
+          ]
+        },
+        {
+          "title": "Total Volume Count",
+          "type": "stat",
+          "gridPos": { "h": 4, "w": 8, "x": 8, "y": 1 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "seaweedfs_master_volumes_count or sum(seaweedfs_volume_count)",
+              "legendFormat": "volumes"
+            }
+          ]
+        },
+        {
+          "title": "Total Disk Free",
+          "type": "stat",
+          "gridPos": { "h": 4, "w": 8, "x": 16, "y": 1 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "sum(seaweedfs_disk_free_bytes)",
+              "legendFormat": "free"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "bytes" } }
+        },
+        {
+          "title": "Volume Server",
+          "type": "row",
+          "gridPos": { "h": 1, "w": 24, "x": 0, "y": 5 },
+          "collapsed": false
+        },
+        {
+          "title": "Read Rate",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 8, "x": 0, "y": 6 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "sum(rate(seaweedfs_volume_read_total[5m]))",
+              "legendFormat": "reads"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "ops" } }
+        },
+        {
+          "title": "Write Rate",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 8, "x": 8, "y": 6 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "sum(rate(seaweedfs_volume_write_total[5m]))",
+              "legendFormat": "writes"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "ops" } }
+        },
+        {
+          "title": "Disk Usage",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 8, "x": 16, "y": 6 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "seaweedfs_disk_used_bytes",
+              "legendFormat": "{{instance}}"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "bytes" } }
+        },
+        {
+          "title": "Filer",
+          "type": "row",
+          "gridPos": { "h": 1, "w": 24, "x": 0, "y": 14 },
+          "collapsed": false
+        },
+        {
+          "title": "Filer Request Rate",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 12, "x": 0, "y": 15 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "sum(rate(seaweedfs_filer_request_total[5m])) by (type)",
+              "legendFormat": "{{type}}"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "reqps" } }
+        },
+        {
+          "title": "Filer Latency p95",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 12, "x": 12, "y": 15 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "histogram_quantile(0.95, sum(rate(seaweedfs_filer_request_duration_seconds_bucket[5m])) by (le))",
+              "legendFormat": "p95"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "s" } }
+        },
+        {
+          "title": "S3 API",
+          "type": "row",
+          "gridPos": { "h": 1, "w": 24, "x": 0, "y": 23 },
+          "collapsed": false
+        },
+        {
+          "title": "S3 Requests",
+          "type": "timeseries",
+          "gridPos": { "h": 8, "w": 24, "x": 0, "y": 24 },
+          "datasource": { "uid": "prometheus" },
+          "targets": [
+            {
+              "expr": "sum(rate(seaweedfs_s3_request_total[5m])) by (bucket, method)",
+              "legendFormat": "{{bucket}} {{method}}"
+            }
+          ],
+          "fieldConfig": { "defaults": { "unit": "reqps" } }
+        }
+      ],
+      "schemaVersion": 39,
+      "tags": ["seaweedfs", "storage", "s3"],
+      "time": { "from": "now-1h", "to": "now" },
+      "title": "SeaweedFS",
+      "uid": "seaweedfs"
+    }