-- Add post_type column
ALTER TABLE social_posts ADD COLUMN post_type text NOT NULL DEFAULT 'post'
  CONSTRAINT social_posts_type_check CHECK (post_type IN ('post', 'broadcast'));

-- Add sticky_until for 48h broadcast stickiness
ALTER TABLE social_posts ADD COLUMN sticky_until timestamptz;

-- Index for sticky-first feed ordering
CREATE INDEX social_posts_sticky_feed_idx ON social_posts(
  sticky_until DESC NULLS LAST,
  created_at DESC,
  id DESC
) WHERE parent_post_id IS NULL;

-- Update audit_events check constraint to add new type
ALTER TABLE audit_events DROP CONSTRAINT audit_events_type_check;
ALTER TABLE audit_events ADD CONSTRAINT audit_events_type_check CHECK (
  type IN (
    'login',
    'token-issued',
    'token-rotated',
    'token-revoked',
    'jwt-issued',
    'agent-created',
    'agent-deleted',
    'room-created',
    'room-deleted',
    'message-sent',
    'social-channel-created',
    'social-post-created',
    'social-broadcast-created'
  )
);