message: Make more fields non-null
diff: @@ -398,6 +398,47 @@ pub fn migrate(version: Option<Version>, conn: &mut Client) -> CratesfyiResult<(
  // downgrade query
  "DROP TABLE doc_coverage;"
  ),
  + migration!(
  + context,
  + // version
  + 17,
  + // description
  + "Make many more fields non-null",
  + // upgrade query
  + "
  + ALTER TABLE queue ALTER COLUMN name SET NOT NULL;
  + ALTER TABLE queue ALTER COLUMN version SET NOT NULL;
  + ALTER TABLE queue ALTER COLUMN priority SET NOT NULL;
  + ALTER TABLE queue ALTER COLUMN attempt SET NOT NULL;
  + ALTER TABLE doc_coverage ALTER COLUMN release_id SET NOT NULL;
  + ALTER TABLE releases ALTER COLUMN version SET NOT NULL;
  + ALTER TABLE releases ALTER COLUMN rustdoc_status SET NOT NULL;
  + ALTER TABLE releases ALTER COLUMN build_status SET NOT NULL;
  + ALTER TABLE releases ALTER COLUMN have_examples SET NOT NULL;
  + ALTER TABLE releases ALTER COLUMN is_library SET NOT NULL;
  + ALTER TABLE authors ALTER COLUMN name SET NOT NULL;
  + ALTER TABLE owners ALTER COLUMN avatar SET NOT NULL;
  + ALTER TABLE owners ALTER COLUMN name SET NOT NULL;
  + ALTER TABLE crates ALTER COLUMN github_stars SET NOT NULL;
  + ",
  + // downgrade query
  + "
  + ALTER TABLE queue ALTER COLUMN name DROP NOT NULL;
  + ALTER TABLE queue ALTER COLUMN version DROP NOT NULL;
  + ALTER TABLE queue ALTER COLUMN priority DROP NOT NULL;
  + ALTER TABLE queue ALTER COLUMN attempt DROP NOT NULL;
  + ALTER TABLE doc_coverage ALTER COLUMN release_id DROP NOT NULL;
  + ALTER TABLE releases ALTER COLUMN version DROP NOT NULL;
  + ALTER TABLE releases ALTER COLUMN rustdoc_status DROP NOT NULL;
  + ALTER TABLE releases ALTER COLUMN build_status DROP NOT NULL;
  + ALTER TABLE releases ALTER COLUMN have_examples DROP NOT NULL;
  + ALTER TABLE releases ALTER COLUMN is_library DROP NOT NULL;
  + ALTER TABLE authors ALTER COLUMN name DROP NOT NULL;
  + ALTER TABLE owners ALTER COLUMN avatar DROP NOT NULL;
  + ALTER TABLE owners ALTER COLUMN name DROP NOT NULL;
  + ALTER TABLE crates ALTER COLUMN github_stars DROP NOT NULL;
  + "
  + )
  ];
  for migration in migrations {
  