resource quota review: fix OOM risks, close quota gaps, add HA protections

Phase 1 - OOM fixes:
- dashy: increase memory limit 512Mi→1Gi (was at 99% utilization)
- caretta DaemonSet: set explicit resources 300Mi/512Mi (was at 85-98%)
- mysql-operator: add Helm resource values 256Mi/512Mi, create namespace
  with tier label (was at 92% of LimitRange default)
- prowlarr, flaresolverr, annas-archive-stacks: add explicit resources
  (outgrowing 256Mi LimitRange defaults)
- real-estate-crawler celery: add resources 512Mi/3Gi (608Mi actual, no
  explicit resources)

Phase 2 - Close quota gaps:
- nvidia, real-estate-crawler, trading-bot: remove custom-quota=true
  labels so Kyverno generates tier-appropriate quotas
- descheduler: add tier=1-cluster label for proper classification

Phase 3 - Reduce excessive quotas:
- monitoring: limits.memory 240Gi→64Gi, limits.cpu 120→64
- woodpecker: limits.memory 128Gi→32Gi, limits.cpu 64→16
- GPU tier default: limits.memory 96Gi→32Gi, limits.cpu 48→16

Phase 4 - Kubelet protection:
- Add cpu: 200m to systemReserved and kubeReserved in kubelet template

Phase 5 - HA improvements:
- cloudflared: add topology spread (ScheduleAnyway) + PDB (maxUnavailable:1)
- grafana: add topology spread + PDB via Helm values
- crowdsec LAPI: add topology spread + PDB via Helm values
- authentik server: add topology spread via Helm values
- authentik worker: add topology spread + PDB via Helm values

stacks/platform/modules/dbaas/main.tf

@@ -56,15 +56,37 @@ module "tls_secret" {
 # Operator installed in mysql-operator namespace (toleration for control-plane).
 # Init containers are slow (~20 min each) due to mysqlsh plugin loading.
 
+resource "kubernetes_namespace" "mysql_operator" {
+  metadata {
+    name = "mysql-operator"
+    labels = {
+      tier = "1-cluster"
+    }
+  }
+}
+
 resource "helm_release" "mysql_operator" {
-  namespace        = "mysql-operator"
-  create_namespace = true
+  namespace        = kubernetes_namespace.mysql_operator.metadata[0].name
+  create_namespace = false
   name             = "mysql-operator"
   timeout          = 300
 
   repository = "https://mysql.github.io/mysql-operator/"
   chart      = "mysql-operator"
   version    = "2.2.7"
+
+  values = [yamlencode({
+    resources = {
+      requests = {
+        cpu    = "100m"
+        memory = "256Mi"
+      }
+      limits = {
+        cpu    = "500m"
+        memory = "512Mi"
+      }
+    }
+  })]
 }
 
 # The mysql-sidecar ClusterRole created by the Helm chart is missing