ingress latency: add histogram buckets, fix restarts, right-size memory

- Traefik: add fine-grained Prometheus histogram buckets (0.01-30s) for meaningful P50/P99
- Calibre: relax liveness probe (timeout 5→10s, threshold 3→6) to stop NFS-caused restarts
- Novelapp: increase memory 128Mi/256Mi → 640Mi/640Mi (confirmed OOMKilled, VPA upper 505Mi)
- Forgejo: increase memory 256Mi → 384Mi (at 80% of limit, VPA upper 311Mi)
- ActualBudget: add explicit resources to prevent silent LimitRange defaults
- Docs: update Nextcloud note from 4Gi → 8Gi limit (Apache spike history)

stacks/actualbudget/factory/main.tf

@@ -64,6 +64,15 @@ resource "kubernetes_deployment" "actualbudget" {
           port {
             container_port = 5006
           }
+          resources {
+            requests = {
+              cpu    = "15m"
+              memory = "160Mi"
+            }
+            limits = {
+              memory = "256Mi"
+            }
+          }
           volume_mount {
             name       = "data"
             mount_path = "/data"

stacks/calibre/main.tf

@@ -244,9 +244,9 @@ resource "kubernetes_deployment" "calibre-web-automated" {
               path = "/"
               port = 8083
             }
-            timeout_seconds   = 5
+            timeout_seconds   = 10
             period_seconds    = 30
-            failure_threshold = 3
+            failure_threshold = 6
           }
           resources {
             requests = {

stacks/forgejo/main.tf

@@ -95,10 +95,10 @@ resource "kubernetes_deployment" "forgejo" {
           resources {
             requests = {
               cpu    = "15m"
-              memory = "256Mi"
+              memory = "384Mi"
             }
             limits = {
-              memory = "256Mi"
+              memory = "384Mi"
             }
           }
           port {

stacks/novelapp/main.tf

@@ -144,11 +144,11 @@ resource "kubernetes_deployment" "novelapp" {
           }
           resources {
             requests = {
-              memory = "128Mi"
+              memory = "640Mi"
               cpu    = "10m"
             }
             limits = {
-              memory = "256Mi"
+              memory = "640Mi"
             }
           }
         }

stacks/traefik/modules/traefik/main.tf

@@ -172,6 +172,7 @@ resource "helm_release" "traefik" {
         addEntryPointsLabels = true
         addServicesLabels    = true
         addRoutersLabels     = true
+        buckets              = "0.01,0.05,0.1,0.2,0.5,1.0,2.0,5.0,10.0,30.0"
       }
     }