text: ALTER TABLE actors 
      ALTER created_at TYPE TIMESTAMPTZ USING created_at AT TIME ZONE 'UTC', 
      ALTER updated_at TYPE TIMESTAMPTZ USING updated_at AT TIME ZONE 'UTC';
  
  ALTER TABLE objects 
      ALTER created_at TYPE TIMESTAMPTZ USING created_at AT TIME ZONE 'UTC', 
      ALTER updated_at TYPE TIMESTAMPTZ USING updated_at AT TIME ZONE 'UTC';
  
  ALTER TABLE oauth_applications 
      ALTER created_at TYPE TIMESTAMPTZ USING created_at AT TIME ZONE 'UTC', 
      ALTER updated_at TYPE TIMESTAMPTZ USING updated_at AT TIME ZONE 'UTC';
  
  ALTER TABLE oauth_authorizations 
      ALTER created_at TYPE TIMESTAMPTZ USING created_at AT TIME ZONE 'UTC', 
      ALTER updated_at TYPE TIMESTAMPTZ USING updated_at AT TIME ZONE 'UTC', 
      ALTER valid_until TYPE TIMESTAMPTZ USING valid_until AT TIME ZONE 'UTC';
  
  ALTER TABLE oauth_tokens 
      ALTER created_at TYPE TIMESTAMPTZ USING created_at AT TIME ZONE 'UTC', 
      ALTER updated_at TYPE TIMESTAMPTZ USING updated_at AT TIME ZONE 'UTC', 
      ALTER valid_until TYPE TIMESTAMPTZ USING valid_until AT TIME ZONE 'UTC';
  