fix(infra): add kubelet node-labels to all Kapsule pools

Nodes from autoscaler now get pool=<name> labels automatically via
kubelet_args, eliminating the need to manually label nodes after
scale-up events.

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

infra/modules/kapsule/main.tf

@@ -51,6 +51,10 @@ resource "scaleway_k8s_pool" "services" {
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
 
+  kubelet_args = {
+    "node-labels" = "pool=services"
+  }
+
   lifecycle {
     ignore_changes = [size]
   }
@@ -69,6 +73,10 @@ resource "scaleway_k8s_pool" "gitlab" {
   autohealing        = true
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
+
+  kubelet_args = {
+    "node-labels" = "pool=gitlab"
+  }
 }
 
 # CI compile pool (L4 — 24GB VRAM, CUDA CC 89, for cargo check/test/build)
@@ -85,6 +93,10 @@ resource "scaleway_k8s_pool" "ci_compile" {
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
 
+  kubelet_args = {
+    "node-labels" = "pool=ci-compile"
+  }
+
   lifecycle {
     ignore_changes = [size]
   }
@@ -104,6 +116,10 @@ resource "scaleway_k8s_pool" "ci_training" {
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
 
+  kubelet_args = {
+    "node-labels" = "pool=ci-training"
+  }
+
   lifecycle {
     ignore_changes = [size]
   }
@@ -123,6 +139,10 @@ resource "scaleway_k8s_pool" "ci_compile_cpu" {
   public_ip_disabled = var.public_ip_disabled
   region             = var.region
 
+  kubelet_args = {
+    "node-labels" = "pool=ci-compile-cpu"
+  }
+
   lifecycle {
     ignore_changes = [size]
   }
@@ -143,6 +163,10 @@ resource "scaleway_k8s_pool" "dev" {
   wait_for_pool_ready  = false
   region               = var.region
 
+  kubelet_args = {
+    "node-labels" = "pool=gpu-dev"
+  }
+
   lifecycle {
     ignore_changes = [size]
   }