fix(client): default listEvents to open events

[cesarenaldi]

Summary

• default listEvents requests to closed=false when callers omit closed
• document the default on the action and bound client method
• add a patch changeset for @polymarket/client

Fixes #75
Linear: DEV-169

Verification

• pnpm lint
• pnpm typecheck

---

Note

Medium Risk
Changes default query behavior for existing callers who omitted closed, which can break assumptions about which events are returned.

Overview
listEvents now treats omitted closed as open-only events by applying closed: false in ListEventsRequestSchema instead of leaving the filter unset.

JSDoc on the low-level listEvents action and the discovery client’s listEvents method documents that default and notes that closed: true is required for settled events. A patch changeset records the @polymarket/client release note.

Callers who previously omitted closed and relied on the API returning both open and settled events will see narrower results unless they pass closed: true (or adjust filters explicitly).

^{Reviewed by Cursor Bugbot for commit ca675ff. Bugbot is set up for automated code reviews on this repo. Configure here.}