Fix destructive update behavior in n8n cookie operations

Avoid clearing existing values when optional fields are left at their
defaults: only send privacyPolicyUrl/maxAgeSeconds when truthy, filter
empty entries from gcmConsentTypes, and constrain consentExpiryDays to
positive integers on create.

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/n8n-node/nodes/Probo/actions/cookieBanner/create.operation.ts

@@ -82,6 +82,9 @@ export const description: INodeProperties[] = [
 				operation: ['create'],
 			},
 		},
+		typeOptions: {
+			minValue: 1,
+		},
 		default: 365,
 		description: 'Number of days before consent expires',
 		required: true,