Add agency-only schedule fields and queue for pipeline creatives.

Approved pieces can be timed for IG/FB from the agency board; cron queues due jobs and calendar uses scheduled_at. Meta publish comes next.

Co-authored-by: Cursor <cursoragent@cursor.com>

sql/creative_pipeline_schedule.sql

@@ -0,0 +1,52 @@
+-- Agency-only scheduling for editorial creativities.
+-- aprobado + scheduled_at → cron publishes IG/FB; status becomes publicado.
+-- Idempotent.
+
+alter table public.creative_pipeline
+  add column if not exists scheduled_at timestamptz;
+
+alter table public.creative_pipeline
+  add column if not exists channels text[] not null default array['instagram','facebook']::text[];
+
+alter table public.creative_pipeline
+  add column if not exists publish_status text not null default 'idle';
+
+do $$ begin
+  if not exists (
+    select 1 from pg_constraint where conname = 'creative_pipeline_publish_status_chk'
+  ) then
+    alter table public.creative_pipeline
+      add constraint creative_pipeline_publish_status_chk
+      check (publish_status in ('idle', 'queued', 'publishing', 'published', 'failed'));
+  end if;
+end $$;
+
+alter table public.creative_pipeline
+  add column if not exists publish_attempts int not null default 0;
+
+alter table public.creative_pipeline
+  add column if not exists published_at timestamptz;
+
+alter table public.creative_pipeline
+  add column if not exists meta_ig_media_id text;
+
+alter table public.creative_pipeline
+  add column if not exists meta_fb_post_id text;
+
+alter table public.creative_pipeline
+  add column if not exists publish_error text;
+
+create index if not exists creative_pipeline_due_publish_idx
+  on public.creative_pipeline (tenant_id, scheduled_at)
+  where status = 'aprobado' and publish_status in ('idle', 'queued', 'failed');
+
+create index if not exists creative_pipeline_scheduled_at_idx
+  on public.creative_pipeline (tenant_id, scheduled_at)
+  where scheduled_at is not null;
+
+comment on column public.creative_pipeline.scheduled_at is
+  'Agency-only: when to publish to Meta (IG/FB). Null = not scheduled.';
+comment on column public.creative_pipeline.channels is
+  'Agency-only: subset of {instagram,facebook} to publish at scheduled_at.';
+comment on column public.creative_pipeline.publish_status is
+  'idle|queued|publishing|published|failed — worker state separate from editorial status.';