Get a board's activity feed

One merged, newest-first feed for this board: card and board-configuration changes, automation log rows (runs and configuration edits) and card comments. Every read is pinned to this board and bounded in time (the last 92 days, or 365 when cardId is given). Page with before: pass the nextCursor of the previous page; it is null on the last page. Change values are shortened (long text is clipped, large structures summarised as [N items]), and automation configuration snapshots are not included. Webhook URL credentials are masked in both current and previous change values. Audit rows containing both comments and other changes match both type filters. When both are requested, each mixed row appears once as a change item with comments included. Unrelated query parameters (including x-token authentication and cache-busters) are ignored when validating the activity filters. Needs a credential that can administer the board's configuration (an API key, or an internal partner token with board-admin); delegate tokens are refused even when an x-token is also supplied in a header or query parameter.