feat(apps): Fix empty SLI metrics

apps/k8s01/immich/slo.yaml

@@ -11,7 +11,7 @@ spec:
       description: "Immich: SLO based on availability for HTTP request responses."
       sli:
         events:
-          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="immich",ingress="immich",status=~"(5..|429)"}[{{.window}}]))
+          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="immich",ingress="immich",status=~"(5..|429)"}[{{.window}}])) OR vector(0)
           totalQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="immich",ingress="immich"}[{{.window}}])) > 0 OR vector(1)
       alerting:
         name: ImmichHighErrorRate

apps/k8s01/jellyfin/slo.yaml

@@ -11,7 +11,7 @@ spec:
       description: "Jellyfin: SLO based on availability for HTTP request responses."
       sli:
         events:
-          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="jellyfin",ingress="jellyfin",status=~"(5..|429)"}[{{.window}}]))
+          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="jellyfin",ingress="jellyfin",status=~"(5..|429)"}[{{.window}}])) OR vector(0)
           totalQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="jellyfin",ingress="jellyfin"}[{{.window}}])) > 0 OR vector(1)
       alerting:
         name: JellyfinHighErrorRate

apps/k8s01/keycloak/slo.yaml

@@ -11,7 +11,7 @@ spec:
       description: "Keycloak: SLO based on availability for HTTP request responses."
       sli:
         events:
-          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="keycloak",ingress="keycloak",status=~"(5..|429)"}[{{.window}}]))
+          errorQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="keycloak",ingress="keycloak",status=~"(5..|429)"}[{{.window}}])) OR vector(0)
           totalQuery: sum(rate(nginx_ingress_controller_requests{exported_namespace="keycloak",ingress="keycloak"}[{{.window}}])) > 0 OR vector(1)
       alerting:
         name: KeycloakHighErrorRate