Reply to an ad comment

Returns comments on an ad's underlying creative post. Useful for moderating or analyzing engagement on dark posts (ad creatives that never went live organically), which the regular GET /v1/inbox/comments/{postId} endpoint cannot serve because dark posts are not in Zernio's post database. An ad that runs on both Facebook feed and Instagram feed has two separate underlying posts with separate comment threads (the creative's effective_object_story_id and effective_instagram_media_id). Use the `placement` query param to pick one; with no param the Instagram side is returned when it exists, otherwise Facebook. The identifiers are read from the ad record (persisted during sync) with a Marketing-API fallback for ads that predate the field. For Instagram-placed comments, the Instagram account that runs the ad must be connected to Zernio, because those comments are read through that account's token. If no connected Instagram account on the profile can read the ad's media, the call returns ads_connection_required (the Facebook side, if any, is still readable via ?placement=facebook). TikTok uses the connected TikTok Ads advertiser token and supports both paid video ads and Spark Ads. `since` and `until` select a date window of at most 30 days; the default is the last 30 days. TikTok searches by ad group, so Zernio filters each page to this ad. A page can be empty while `pagination.hasMore` is true. Reuse `pagination.cursor` with the same `limit`; the cursor retains the date window. `placement` is Meta-only and returns a 400 for TikTok. TikTok returns replies as separate comments with `parentId`; nested reply fetching is not supported. `canReply` requires a first-level comment and an identity with comment-management permission. `canDelete` reflects TikTok's own-comment deletion capability. `canHide` is supported and `canLike` is false. Use the ad comment reply, hide and delete operations below to moderate TikTok comments. Other platforms return feature_not_available. Requires the Ads add-on. Response shape matches GET /v1/inbox/comments/{postId}. The `{adId}` path segment accepts any identifier dialect Zernio indexes for the ad: Zernio internal `_id` (24-char hex), the numeric `platformAdId` (the value shipped in `comment.received` webhooks as `comment.ad.id`), or the creative's `effective_object_story_id` / `effective_instagram_media_id`. Caller doesn't need a translation step.