fix cluster health: resolve 21/23 failures from healthcheck

- nvidia: change GPU taint NoSchedule -> PreferNoSchedule to allow
  overflow scheduling on k8s-node1 (frees ~7Gi capacity)
- kyverno: increase reports-controller memory 256Mi -> 512Mi (OOMKilled)
- speedtest: add missing DB_PORT=3306 env var (nc: service "" unknown)
- realestate-crawler: increase API memory 64Mi -> 256Mi (OOMKilled)
- calibre: increase liveness probe timeout 1s -> 5s (false restarts)

stacks/calibre/main.tf

@@ -215,6 +215,7 @@ resource "kubernetes_deployment" "calibre-web-automated" {
               path = "/"
               port = 8083
             }
+            timeout_seconds   = 5
             period_seconds    = 30
             failure_threshold = 3
           }

stacks/platform/modules/kyverno/main.tf

@@ -30,11 +30,11 @@ resource "helm_release" "kyverno" {
     reportsController = {
       resources = {
         limits = {
-          memory = "256Mi"
+          memory = "512Mi"
         }
         requests = {
           cpu    = "100m"
-          memory = "128Mi"
+          memory = "384Mi"
         }
       }
     }

stacks/platform/modules/nvidia/main.tf

@@ -37,7 +37,7 @@ resource "kubernetes_resource_quota" "nvidia_quota" {
 resource "null_resource" "gpu_node_config" {
   provisioner "local-exec" {
     command = <<-EOT
-      kubectl taint nodes k8s-node1 nvidia.com/gpu=true:NoSchedule --overwrite
+      kubectl taint nodes k8s-node1 nvidia.com/gpu=true:PreferNoSchedule --overwrite
       kubectl label nodes k8s-node1 gpu=true --overwrite
     EOT
   }

stacks/real-estate-crawler/main.tf

@@ -210,10 +210,10 @@ resource "kubernetes_deployment" "realestate-crawler-api" {
           resources {
             requests = {
               cpu    = "15m"
-              memory = "64Mi"
+              memory = "256Mi"
             }
             limits = {
-              memory = "64Mi"
+              memory = "256Mi"
             }
           }
           volume_mount {

stacks/speedtest/main.tf

@@ -111,6 +111,10 @@ resource "kubernetes_deployment" "speedtest" {
             name  = "DB_PASSWORD"
             value = data.vault_kv_secret_v2.secrets.data["db_password"]
           }
+          env {
+            name  = "DB_PORT"
+            value = "3306"
+          }
           env {
             name  = "APP_TIMEZONE"
             value = "Europe/Sofia"