feat(profiles): add typed live step config profiles

Profiles store script + default config per owner. Workflow steps reference
them with profile:, overlay keys win, and the UI marks overrides. Profile
name is immutable after create so YAML refs stay stable.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/server/workflow-validate-warnings.js

@@ -85,6 +85,7 @@ export function collectWorkflowWarnings(content) {
       try {
         const step = parseScriptStep(raw);
         if (step.kind === "set") continue;
+        if (step.profile && !step.script) continue;
         const resolved = resolveScriptRef(step.script);
         if (resolved.error) {
           warnings.push({