bump memory limits for OOM-prone services

FreshRSS: 64Mi → 256Mi (171 restarts, VPA upper ~204Mi)
Actual Budget HTTP API: 128Mi → 384Mi (17 restarts, VPA upper ~297Mi)
n8n: 768Mi → 1Gi (18 restarts, VPA upper ~765Mi)
Dawarich: 768Mi → 896Mi (2 restarts, VPA upper ~628Mi)
Traefik: 384Mi → 768Mi (2 restarts, VPA upper ~584Mi)

stacks/freshrss/main.tf

@@ -134,10 +134,10 @@ resource "kubernetes_deployment" "freshrss" {
           resources {
             requests = {
               cpu    = "15m"
-              memory = "64Mi"
+              memory = "256Mi"
             }
             limits = {
-              memory = "64Mi"
+              memory = "256Mi"
             }
           }
         }