ALTER TABLE crawl_runs
ADD COLUMN IF NOT EXISTS skipped_count INTEGER NOT NULL DEFAULT 0;

CREATE TABLE IF NOT EXISTS parse_resource_cache (
  id SERIAL PRIMARY KEY,
  profile_key VARCHAR(255) NOT NULL,
  resource_key VARCHAR(255) NOT NULL,
  method VARCHAR(16) NOT NULL,
  url TEXT NOT NULL,
  request_fingerprint VARCHAR(64) NOT NULL,
  etag TEXT,
  last_modified TEXT,
  body_hash VARCHAR(64) NOT NULL,
  body_snapshot BYTEA NOT NULL,
  parser_version VARCHAR(32),
  fetched_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  CONSTRAINT uq_parse_resource_cache_resource UNIQUE (profile_key, resource_key, request_fingerprint)
);

CREATE INDEX IF NOT EXISTS ix_parse_resource_cache_profile_key
  ON parse_resource_cache (profile_key);