feat(infra): enable always-on pool autoscaling to 2 nodes

Services moved off L40S GPU node to always-on DEV1-M pool.
Single DEV1-M couldn't fit all services, so enable autoscaling
with max_size=2 to allow a second node when needed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infra/live/production/kapsule/terragrunt.hcl

@@ -9,7 +9,8 @@ terraform {
 inputs = {
   cluster_name   = "foxhunt"
   k8s_version    = "1.34"
-  always_on_type = "DEV1-M"
+  always_on_type     = "DEV1-M"
+  always_on_max_size = 2
 
   # GitLab CE pool (dedicated for GitLab + Prometheus + Runner manager)
   enable_gitlab_pool = true

infra/modules/kapsule/main.tf

@@ -32,11 +32,15 @@ resource "scaleway_k8s_pool" "always_on" {
   node_type   = var.always_on_type
   size        = 1
   min_size    = 1
-  max_size    = 1
-  autoscaling        = false
+  max_size    = var.always_on_max_size
+  autoscaling        = true
   autohealing        = true
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
+
+  lifecycle {
+    ignore_changes = [size]
+  }
 }
 
 # GitLab CE node pool (dedicated DEV1-L for GitLab + Runner manager)

infra/modules/kapsule/variables.tf

@@ -21,6 +21,12 @@ variable "always_on_type" {
   default     = "DEV1-M"
 }
 
+variable "always_on_max_size" {
+  description = "Maximum number of nodes in the always-on pool (autoscaling)"
+  type        = number
+  default     = 2
+}
+
 variable "enable_gitlab_pool" {
   description = "Create dedicated node pool for GitLab CE"
   type        = bool