Unpublish post

Create multiple posts by uploading a CSV file. Use dryRun=true to validate without creating posts. CSV columns: - Required: `platforms`, `profiles`, and a schedule (one of `schedule_time`, a `schedule_time_<platform>` override, `publish_now=true`, `use_queue=true`, or `is_draft=true`). - Content: at least one of `post_content`, `title`, or `media_urls` is required. - Aliases: a handful of columns accept the JSON field name from POST /v1/posts, since integrators infer the CSV shape from that endpoint's body. When both are present the real CSV column wins, unless it is blank for that row, in which case the alias value is used. - `content` aliases `post_content` - `timezone` aliases `tz` - `scheduledFor` aliases `schedule_time` - `mediaUrls` aliases `media_urls` - Per-platform overrides use three dynamic column prefixes, one column per platform (e.g. `schedule_time_instagram`, `custom_content_tiktok`, `custom_media_youtube`): `schedule_time_<platform>`, `custom_content_<platform>`, `custom_media_<platform>`. - Any other column is not read. It does not error, but it is reported in the response's `warnings` array as `unknown_columns:<a,b,c>` (see BulkUploadResult), so a misnamed or unsupported column is never silently dropped. - Row limits: 5000 rows is a hard cap that returns 400 above it. 500 rows is only an advisory threshold, it adds `rows_exceed_advisory_limit:500` to `warnings` and the request still processes. Example row (header + one data row): ``` post_content,platforms,profiles,schedule_time,tz "Hello world",instagram,MyProfile,2026-09-01 10:00,America/New_York ```