fix(test): grant societe client voir (262) so /thirdparties list works

Validating ai_agent_sandbox's key against the sandbox API, /thirdparties
returned 404 (the voir_tous ACL trap) while /invoices, /products,
/supplierinvoices returned 200. The missing right is `societe client voir`
(id 262, "see all thirdparties") — prod's ai_agent has it. Added it to
WRITE_IDS so the list endpoint works; other modules' lists are fine with plain
`lire`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

test/provisionSandbox.ts

@@ -34,7 +34,7 @@ import userSetup from "./scripts/admin/userSetup.ts";
   Write rights to grant `ai_agent_sandbox` (stable Dolibarr rights ids, verified
   against prod Dolibarr 22.0.4). Each module's read (lire) + create (creer):
     facture:           lire=11,   creer=12
-    societe:           lire=121,  creer=122
+    societe:           lire=121,  creer=122, client voir (see-all)=262
     societe contact:   lire=281,  creer=282
     fournisseur:       lire=1181, facture lire=1231, facture creer=1232
     produit:           lire=31,   creer=32
@@ -44,6 +44,9 @@ const WRITE_IDS = [
   12, // facture creer
   121, // societe lire
   122, // societe creer
+  262, // societe client "voir" (see-all) — REQUIRED for the /thirdparties LIST
+  //      endpoint; without it the list 404s (the voir_tous ACL trap, cf. the
+  //      dolibarr skill SKILL.md). Other modules' lists work with plain `lire`.
   281, // societe contact lire
   282, // societe contact creer
   1181, // fournisseur lire