feat(staffing): enforce planning and cost audiences

packages/api/src/router/assistant.ts

@@ -222,6 +222,7 @@ const COST_TOOLS = new Set([
   "get_estimate_detail",
   "get_estimate_version_snapshot",
   "find_best_project_resource",
+  "get_staffing_suggestions",
 ]);
 
 /** Tools that follow planningReadProcedure access rules in the main API. */
@@ -229,6 +230,9 @@ const PLANNING_READ_TOOLS = new Set([
   "list_allocations",
   "list_demands",
   "check_resource_availability",
+  "get_staffing_suggestions",
+  "find_capacity",
+  "find_best_project_resource",
 ]);
 
 /** Tools that follow controllerProcedure access rules in the main API. */