-- Relax foreign key constraints for configuration_items sync
-- This allows configuration items to be synced even when referenced contacts don't exist

-- Make contact_id constraint deferrable and nullable
ALTER TABLE configuration_items 
  DROP CONSTRAINT IF EXISTS configuration_items_contact_id_fkey;

-- Add back the constraint as deferrable with ON DELETE SET NULL
ALTER TABLE configuration_items 
  ADD CONSTRAINT configuration_items_contact_id_fkey 
  FOREIGN KEY (contact_id) 
  REFERENCES contacts(id) 
  ON DELETE SET NULL 
  DEFERRABLE INITIALLY DEFERRED;

-- Ensure contact_id column is nullable
ALTER TABLE configuration_items 
  ALTER COLUMN contact_id DROP NOT NULL;