fix: PGPASSWORD env var, neuron registry, gitea domain

- backup.tf: rename POSTGRES_PASSWORD → PGPASSWORD so pg_dumpall
  can authenticate (was silently failing for 2 days)
- neuron.yaml: fix image registry nook.family → neuralplatform.ai
- gitea.yaml: fix domain neuralplatform.dev → neuralplatform.ai

servers/legion/apps/gitea.yaml

@@ -40,11 +40,11 @@ spec:
                   name: gitea-db
                   key: password
             - name: GITEA__server__DOMAIN
-              value: git.neuralplatform.dev
+              value: git.neuralplatform.ai
             - name: GITEA__server__ROOT_URL
-              value: https://git.neuralplatform.dev
+              value: https://git.neuralplatform.ai
             - name: GITEA__server__SSH_DOMAIN
-              value: git.neuralplatform.dev
+              value: git.neuralplatform.ai
             - name: GITEA__server__SSH_PORT
               value: "30022"
             - name: GITEA__server__START_SSH_SERVER

servers/legion/apps/neuron.yaml

@@ -19,7 +19,7 @@ spec:
     spec:
       containers:
         - name: neuron
-          image: registry.nook.family/neural-platform/neuron:latest
+          image: registry.neuralplatform.ai/neural-platform/neuron:latest
           imagePullPolicy: Always
           command:
             - bash

servers/legion/backup.tf

@@ -13,7 +13,7 @@ resource "kubernetes_secret" "backup_credentials" {
     AWS_ACCESS_KEY_ID        = var.r2_access_key_id
     AWS_SECRET_ACCESS_KEY    = var.r2_secret_access_key
     RESTIC_REPOSITORY        = "s3:${var.r2_endpoint}/legion-gitea-backup"
-    POSTGRES_PASSWORD        = var.postgres_password
+    PGPASSWORD               = var.postgres_password
   }
 }