-- =============================================================================
-- indicators.metadata JSONB (Phase 16 — D-07)
-- =============================================================================
-- Lets an attachment-hash indicator carry filename/content-type/size, or a
-- URL indicator carry which message part it came from, without duplicating
-- that context into the parent messages row.
--
-- Nullable, no default — existing rows (there are none yet for this table)
-- are unaffected; this is a pure additive change.
-- =============================================================================

ALTER TABLE indicators
  ADD COLUMN IF NOT EXISTS metadata JSONB;

COMMENT ON COLUMN indicators.metadata IS
  'Per-indicator context (e.g. attachment filename/content-type/size for attachment-hash indicators, or source message part for URL indicators). Nullable — no backfill required.';