storage: migrate speedtest off proxmox-lvm to NFS (LUN-cap relief)

speedtest-tracker is MySQL-backed (config dir = Laravel config + logs, no
embedded DB), NFS-safe. Frees one proxmox-csi SCSI-LUN slot.

- swap speedtest-config-proxmox -> nfs_volume module
- config copied + verified (HTTP 302->login,200); excluded 383MB laravel.log
- block PVC removed; LV retained per SC policy (code-dfjn cleanup)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

stacks/speedtest/main.tf

@@ -58,33 +58,16 @@ resource "random_id" "secret_key" {
   byte_length = 32 # 32 bytes × 2 hex chars = 64 hex characters
 }
 
-resource "kubernetes_persistent_volume_claim" "config_proxmox" {
-  wait_until_bound = false
-  metadata {
-    name      = "speedtest-config-proxmox"
-    namespace = kubernetes_namespace.speedtest.metadata[0].name
-    annotations = {
-      "resize.topolvm.io/threshold"     = "10%"
-      "resize.topolvm.io/increase"      = "100%"
-      "resize.topolvm.io/storage_limit" = "5Gi"
-    }
-  }
-  spec {
-    access_modes       = ["ReadWriteOnce"]
-    storage_class_name = "proxmox-lvm"
-    resources {
-      requests = {
-        storage = "1Gi"
-      }
-    }
-  }
-  lifecycle {
-    # The autoresizer expands requests.storage up to storage_limit and
-    # PVCs can't shrink. Without this, every TF apply tries to revert
-    # to the spec value, K8s rejects the shrink, and the PVC ends up
-    # in Terminating-but-in-use limbo.
-    ignore_changes = [spec[0].resources[0].requests]
-  }
+# Config on NFS. Migrated off proxmox-lvm 2026-06-05 for LUN-cap relief —
+# speedtest-tracker is MySQL-backed (config dir = logs + Laravel config, no
+# embedded DB), NFS-safe. See docs/plans/2026-06-05-block-storage-harden-nfs-design.md
+module "nfs_speedtest" {
+  source     = "../../modules/kubernetes/nfs_volume"
+  name       = "speedtest-config-nfs"
+  namespace  = kubernetes_namespace.speedtest.metadata[0].name
+  nfs_server = var.nfs_server
+  nfs_path   = "/srv/nfs/speedtest"
+  storage    = "5Gi"
 }
 
 resource "kubernetes_deployment" "speedtest" {
@@ -202,7 +185,7 @@ resource "kubernetes_deployment" "speedtest" {
         volume {
           name = "config"
           persistent_volume_claim {
-            claim_name = kubernetes_persistent_volume_claim.config_proxmox.metadata[0].name
+            claim_name = module.nfs_speedtest.claim_name
           }
         }
       }