fix: rybbit init port, mysql memory limit, metallb alert selector

- rybbit-client: fix Kyverno wait-for port 3001 → 80 (service port, not targetPort)
- dbaas: increase MySQL memory limit 4Gi → 5Gi (mysql-cluster-1 at 95.9%)
- dbaas: bump ResourceQuota limits.memory 24Gi → 27Gi to accommodate
- monitoring: fix MetalLBControllerDown alert selector for v0.15 (controller → metallb-controller)

stacks/platform/modules/dbaas/main.tf

@@ -35,8 +35,8 @@ resource "kubernetes_resource_quota" "dbaas" {
   spec {
     hard = {
       "requests.cpu"    = "8"
-      "requests.memory" = "20Gi"
-      "limits.memory"   = "20Gi"
+      "requests.memory" = "23Gi"
+      "limits.memory"   = "23Gi"
       pods              = "30"
     }
   }
@@ -184,7 +184,7 @@ resource "helm_release" "mysql_cluster" {
         memory = "2Gi"
       }
       limits = {
-        memory = "4Gi"
+        memory = "5Gi"
       }
     }
 
@@ -220,7 +220,7 @@ resource "helm_release" "mysql_cluster" {
             cpu    = "250m"
           }
           limits = {
-            memory = "4Gi"
+            memory = "5Gi"
           }
         }
       }]