feat: add serviceAccountName field to config schema

Surface SA assignment in the Kubernetes section of the adapter UI.

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

src/server/config-schema.ts

@@ -42,6 +42,12 @@ export function getConfigSchema(): AdapterConfigSchema {
       default: true,
     },
     // Kubernetes
+    {
+      type: "text",
+      key: "serviceAccountName",
+      label: "Service Account",
+      hint: "Service Account name for Job pods. Defaults to the cluster default.",
+    },
     {
       type: "text",
       key: "namespace",