feat(step): expand detail CAS refs by default in step list

Previously step list showed raw CAS refs for detail fields.
Now detail is recursively expanded (like output already was),
since every turn is individually hashed and walkable.

Refs #463

packages/cli-workflow/src/commands/step.ts

@@ -250,7 +250,7 @@ export async function cmdStepList(
       hash: item.hash,
       role: item.payload.role,
       output: expandOutput(uwf, item.payload.output),
-      detail: item.payload.detail,
+      detail: item.payload.detail ? expandDeep(uwf.store, item.payload.detail) : null,
       agent: item.payload.agent,
       timestamp: item.timestamp,
     });

packages/workflow-protocol/src/types.ts

@@ -92,7 +92,7 @@ export type StepEntry = {
   hash: CasRef;
   role: string;
   output: unknown;
-  detail: CasRef;
+  detail: unknown;
   agent: string;
   timestamp: number;
 };