{"-- Add active column to security_zones table
ALTER TABLE public.security_zones 
ADD COLUMN IF NOT EXISTS active BOOLEAN NOT NULL DEFAULT true","-- Add index for better performance when filtering by active status
CREATE INDEX IF NOT EXISTS idx_security_zones_active ON public.security_zones(active)","-- Add updated_at trigger for security_zones if it doesn't exist
DROP TRIGGER IF EXISTS update_security_zones_updated_at ON public.security_zones","CREATE TRIGGER update_security_zones_updated_at
    BEFORE UPDATE ON public.security_zones
    FOR EACH ROW
    EXECUTE FUNCTION public.update_modified_column()"}