prepare neuron-tim namespace for Tim's future Neuron instance

Adds the neuron-tim namespace (via Terraform) and a full Argo CD
app + k8s manifests mirroring neuron-prod. All deployments set to
replicas=0 — nothing runs until Tim's imprint is ready and Vault
secrets are populated at secret/neuron-technologies/tim.

servers/legion/neuron-technologies.tf

@@ -37,3 +37,16 @@ resource "kubernetes_namespace" "neuron_prod" {
     }
   }
 }
+
+resource "kubernetes_namespace" "neuron_tim" {
+  metadata {
+    name = "neuron-tim"
+    labels = {
+      managed-by  = "terraform"
+      tier        = "apps"
+      environment = "prod"
+      app         = "neuron-technologies"
+      owner       = "tim"
+    }
+  }
+}