-- Add created_at column to tablo_invites table
ALTER TABLE tablo_invites 
ADD COLUMN IF NOT EXISTS created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP NOT NULL;

-- Add comment to document the column
COMMENT ON COLUMN tablo_invites.created_at IS 
    'Timestamp when the invite was created';

-- Create index for performance when querying by creation date
CREATE INDEX IF NOT EXISTS idx_tablo_invites_created_at ON tablo_invites(created_at);