Pause or resume a campaign

Writes the campaign's own on/off switch, then lets the platform cascade delivery to its ad sets and ads. Makes one platform API call, not one per ad.

The switch is always written, whatever delivery status the ads underneath report: an ad still in review does not block resuming its campaign. The echoed status is the confirmation that it landed.

updated / skipped describe only the ads whose own stored status CHANGED alongside it, so updated: 0 is a normal successful response, not a no-op. Ads are skipped when they are in a terminal status (rejected, completed, cancelled), already in the target state, or switched on but not yet delivering — the last group keeps its pending_review / error status until the platform reports what it became. skippedReasons names which case applies.

On Meta this flips the campaign only. An ad set paused in its own right stays paused, so pair this with PUT /v1/ads/ad-sets/{adSetId}/status when you also need the ad set switched back on.