-- Link pipeline creatives to RRSS calendar pieces (documents content.pieces[].id).
-- Idempotent.

alter table public.creative_pipeline
  add column if not exists calendar_piece_id text;

create index if not exists creative_pipeline_calendar_piece_idx
  on public.creative_pipeline (tenant_id, calendar_piece_id)
  where calendar_piece_id is not null;

comment on column public.creative_pipeline.calendar_piece_id is
  'Stable id of the RRSS calendar piece (documents type=calendar → pieces[].id). Agency links pipeline ↔ editorial plan.';