-- Migration 003: Additional Checksum Fields
-- Adds checksum_sha1 and s3_etag fields to artifacts table

-- ============================================
-- Artifacts: Add checksum_sha1 and s3_etag fields
-- ============================================
ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS checksum_sha1 VARCHAR(40);
ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS s3_etag VARCHAR(64);

-- Create indexes for checksum lookups (optional, for verification queries)
CREATE INDEX IF NOT EXISTS idx_artifacts_checksum_md5 ON artifacts(checksum_md5) WHERE checksum_md5 IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_artifacts_checksum_sha1 ON artifacts(checksum_sha1) WHERE checksum_sha1 IS NOT NULL;