feat(ai_working_help): expose folder_uid and user_id on GET /v1/response

Allows LeCoffre backend to validate polls after process restart.

ai_working_help/docs/notary-ai-api.md

@@ -35,7 +35,7 @@
   Écrit dans `projects/<id>/data/notary-ai/pending/<safe_uid>.json`. **Authentification** : header `Authorization: Bearer <token>` obligatoire (le token identifie le projet) ; 401 si absent ou inconnu.
 
 - **GET /v1/response/:request_uid**  
-  Réponse **200** : `{ status: "pending" }` ou `{ status: "responded", response: { answer, nextActionsTable, membersInfoSheet, synthesisRecommendation } }`.  
+  Réponse **200** : `{ status: "pending" }` ou `{ status: "responded", response: { answer, nextActionsTable, membersInfoSheet, synthesisRecommendation } }`. Lorsque le fichier pending ou responded est trouvé, le corps inclut en plus **`folder_uid`** et **`user_id`** (issus du JSON spooler) pour que le backend LeCoffre autorise le poll même si sa table mémoire `request_uid → meta` a été perdue (redémarrage, autre instance).  
   Si le fichier responded contient `anon_mapping`, la réponse est recontextualisée avant envoi (voir `docs/business-qa-api.md`).  
   Lit d’abord `projects/<id>/data/notary-ai/responded/`, sinon `pending/`. **Authentification** : idem (token obligatoire).
 

ai_working_help/server.js

@@ -97,6 +97,17 @@ function findFileByRequestUid(dir, requestUid) {
   return null;
 }
 
+/** Expose folder_uid + user_id so backends without in-memory meta (restart, multi-instance) can authorize GET /response. */
+function ownershipFromPayload(data) {
+  if (!data || typeof data !== "object") return {};
+  const folder_uid = data.folder_uid;
+  const user_id = data.user_id;
+  if (typeof folder_uid === "string" && typeof user_id === "string" && folder_uid.length > 0 && user_id.length > 0) {
+    return { folder_uid, user_id };
+  }
+  return {};
+}
+
 app.get("/health", (req, res) => {
   res.status(200).json({ status: "ok" });
 });
@@ -165,12 +176,13 @@ app.get("/v1/response/:request_uid", requireApiTokenAndResolveProject, (req, res
     return res.status(200).json({
       status: "responded",
       response,
+      ...ownershipFromPayload(foundResponded.data),
     });
   }
   const pendingDir = path.join(dir, "pending");
   const foundPending = findFileByRequestUid(pendingDir, requestUid);
   if (foundPending) {
-    return res.status(200).json({ status: "pending" });
+    return res.status(200).json({ status: "pending", ...ownershipFromPayload(foundPending.data) });
   }
   res.status(200).json({ status: "pending" });
 });