infra: add gpu-dev pool for DevPod remote development

GP1-L (16 vCPU, 64GB), autoscaling 0→1, dedicated for dev pods.
Separate from CI (H100) and inference (L4) pools.

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

infra/live/production/kapsule/terragrunt.hcl

@@ -26,4 +26,9 @@ inputs = {
   gitlab_type        = "GP1-XS"
 
   # CI builds run on gpu-training pool (H100: 24 vCPU, 240GB, fast builds + GPU tests)
+
+  # Dev pool (GP1-L for DevPod remote development, autoscales to zero)
+  enable_dev_pool   = true
+  dev_pool_type     = "GP1-L"
+  dev_pool_max_size = 1
 }

infra/modules/kapsule/main.tf

@@ -89,3 +89,21 @@ resource "scaleway_k8s_pool" "gitlab" {
   region      = var.region
 }
 
+# CPU pool for remote development (DevPod — autoscales to zero)
+resource "scaleway_k8s_pool" "dev" {
+  count       = var.enable_dev_pool ? 1 : 0
+  cluster_id  = scaleway_k8s_cluster.foxhunt.id
+  name        = "gpu-dev"
+  node_type   = var.dev_pool_type
+  size        = 1
+  min_size    = 0
+  max_size    = var.dev_pool_max_size
+  autoscaling = true
+  autohealing = true
+  region      = var.region
+
+  lifecycle {
+    ignore_changes = [size]
+  }
+}
+

infra/modules/kapsule/variables.tf

@@ -69,3 +69,21 @@ variable "gitlab_type" {
   default     = "DEV1-L"
 }
 
+variable "enable_dev_pool" {
+  description = "Create CPU node pool for remote development (DevPod)"
+  type        = bool
+  default     = false
+}
+
+variable "dev_pool_type" {
+  description = "Instance type for the dev node pool"
+  type        = string
+  default     = "GP1-L"
+}
+
+variable "dev_pool_max_size" {
+  description = "Maximum number of nodes in the dev pool"
+  type        = number
+  default     = 1
+}
+