CREATE TABLE IF NOT EXISTS miragenflow_store_snapshots (
  snapshot_key TEXT PRIMARY KEY,
  payload JSONB NOT NULL,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);
CREATE TABLE IF NOT EXISTS miragenflow_domain_rows (
  root_key TEXT NOT NULL,
  entity_id TEXT NOT NULL,
  shape TEXT NOT NULL,
  payload JSONB,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  PRIMARY KEY (root_key, entity_id)
);
CREATE TABLE IF NOT EXISTS miragenflow_store_revisions (
  snapshot_key TEXT PRIMARY KEY,
  revision BIGINT NOT NULL DEFAULT 0,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

ALTER TABLE webdav_files ADD COLUMN IF NOT EXISTS sync_state TEXT NOT NULL DEFAULT 'synced';
ALTER TABLE webdav_sync_jobs ADD COLUMN IF NOT EXISTS intent TEXT;
ALTER TABLE webdav_sync_jobs ADD COLUMN IF NOT EXISTS conflict_copy_path TEXT;

ALTER TABLE generation_tasks ADD COLUMN IF NOT EXISTS event_sequence BIGINT NOT NULL DEFAULT 0;
ALTER TABLE generation_tasks ADD COLUMN IF NOT EXISTS reserve_expires_at TIMESTAMPTZ;
ALTER TABLE generation_tasks ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT now();
ALTER TABLE generation_tasks ADD COLUMN IF NOT EXISTS lease_token TEXT;
ALTER TABLE generation_attempts ADD COLUMN IF NOT EXISTS platform_idempotency_key TEXT;
ALTER TABLE generation_attempts ADD COLUMN IF NOT EXISTS reconciliation_status TEXT;
ALTER TABLE generation_attempts ADD COLUMN IF NOT EXISTS lease_expires_at TIMESTAMPTZ;
ALTER TABLE generation_outputs ADD COLUMN IF NOT EXISTS unit_price_snapshot BIGINT;
ALTER TABLE generation_outputs ADD COLUMN IF NOT EXISTS charged_amount BIGINT;
ALTER TABLE balance_ledger ADD COLUMN IF NOT EXISTS task_id UUID;
ALTER TABLE balance_ledger ADD COLUMN IF NOT EXISTS output_id UUID;
ALTER TABLE balance_ledger ADD COLUMN IF NOT EXISTS bucket_id UUID;
ALTER TABLE balance_ledger ADD COLUMN IF NOT EXISTS expires_at TIMESTAMPTZ;
ALTER TABLE balance_ledger ADD COLUMN IF NOT EXISTS status TEXT NOT NULL DEFAULT 'posted';

CREATE UNIQUE INDEX IF NOT EXISTS generation_attempts_task_sequence_uq ON generation_attempts(task_id, sequence);
CREATE UNIQUE INDEX IF NOT EXISTS generation_attempts_platform_idem_uq ON generation_attempts(platform_idempotency_key) WHERE platform_idempotency_key IS NOT NULL;