feat(grafana): custom emoji message templates per alert + resolve format

Each alert rule's summary annotation now renders a formatted Telegram
message with emoji and multiline context. The contact point passes the
pre-rendered summary through, adding "✅ Resuelto" on resolution.
Also restores the == 1 filter on Pod Failed/Unknown lost in prior rebase.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

monitoring/configmap-grafana-alerting.yaml

@@ -16,6 +16,7 @@ data:
               bottoken: "${TELEGRAM_BOT_TOKEN}"
               chatid: "5138407666"
               parseMode: HTML
+              message: "{{ range .Alerts }}{{ if eq .Status \"firing\" }}{{ .Annotations.summary }}\n{{ else }}✅ Resuelto: {{ .Labels.alertname }}\n{{ end }}{{ end }}"
             disableResolveMessage: false
 
   notification-policy.yaml: |
@@ -48,7 +49,7 @@ data:
             noDataState: OK
             execErrState: Error
             annotations:
-              summary: "CrashLoopBackOff: {{ $labels.pod }} ({{ $labels.namespace }})"
+              summary: "🔄 CrashLoop: {{ $labels.pod }}\nNamespace: {{ $labels.namespace }}"
               description: "Container {{ $labels.container }} ha entrado en CrashLoopBackOff."
             labels:
               severity: critical
@@ -89,7 +90,7 @@ data:
             noDataState: NoData
             execErrState: Error
             annotations:
-              summary: "Disco lleno: {{ $labels.mountpoint }} en {{ $labels.instance }}"
+              summary: "💾 Disco casi lleno: {{ $labels.mountpoint }}\nUso: {{ humanizePercentage $values.B.Value }}"
               description: "Filesystem {{ $labels.mountpoint }} supera el 80% de uso."
             labels:
               severity: warning
@@ -130,7 +131,7 @@ data:
             noDataState: NoData
             execErrState: Error
             annotations:
-              summary: "RAM alta: {{ $labels.instance }}"
+              summary: "🧠 RAM alta: {{ $labels.instance }}\nUso: {{ humanizePercentage $values.B.Value }}"
               description: "Uso de RAM supera el 85% en {{ $labels.instance }}."
             labels:
               severity: warning
@@ -171,7 +172,7 @@ data:
             noDataState: OK
             execErrState: Error
             annotations:
-              summary: "Pod en estado {{ $labels.phase }}: {{ $labels.pod }} ({{ $labels.namespace }})"
+              summary: "🚨 Pod caído: {{ $labels.pod }}\nNamespace: {{ $labels.namespace }}\nEstado: {{ $labels.phase }}"
               description: "Pod {{ $labels.namespace }}/{{ $labels.pod }} lleva más de 3 minutos en estado {{ $labels.phase }}."
             labels:
               severity: warning
@@ -182,7 +183,7 @@ data:
                 datasourceUid: prometheus
                 model:
                   editorMode: code
-                  expr: "kube_pod_status_phase{phase!~\"Running|Succeeded\"}"
+                  expr: "kube_pod_status_phase{phase!~\"Running|Succeeded\"} == 1"
                   instant: true
                   refId: A
               - refId: B