Roll up a quarter of publishing activity into a single aggregate. Useful for BI exports, board-deck stats, or year-on-year comparisons without paginating through every post.

Available for personal workflows and automations only, using a personal API key. The aggregation window is capped to 365 days.

```graphql
query QuarterlyPerformanceReport {
  aggregatedPostMetrics(
    input: {
      organizationId: "some_organization_id"
      startDateTime: "2026-01-01T00:00:00Z"
      endDateTime: "2026-03-31T23:59:59Z"
      channelIds: ["some_channel_id", "another_channel_id"]
      tags: { in: ["some_tag_id"] }
    }
  ) {
    metrics {
      type
      name
      value
      unit
    }
    metricsUpdatedAt
  }
}
```

The result includes a synthetic `postCount` entry (number of matched posts in the window) alongside the metric aggregates. To compare quarters, run the query twice with different `startDateTime`/`endDateTime` windows and diff the values client-side.