listProjectTasks reads one ordered page of project tasks.
automations/list-asana-project-tasks.automation.ts
projectId is required. completedSince is "now" or an ISO timestamp with offset and returns incomplete tasks plus tasks completed since that cutoff. limit is 1–100 and defaults to 100; offset continues pagination; account defaults to the project binding.
Returns Signal<{ tasks: AsanaTask[]; pageInfo: { nextOffset?: string } }>.