feat(cfdi): descarga masiva de XMLs como ZIP, limite 1,000

apps/api/src/services/cfdi.service.ts

@@ -357,6 +357,13 @@ export async function getXmlById(pool: Pool, id: string): Promise<string | null>
   return rows[0]?.xml_original || null;
 }
 
+export async function getXmlsByIds(pool: Pool, ids: number[]): Promise<{ id: number; uuid: string; xml: string | null }[]> {
+  const { rows } = await pool.query(`
+    SELECT id, uuid, xml_original FROM cfdis WHERE id = ANY($1)
+  `, [ids]);
+  return rows.map((r: any) => ({ id: r.id, uuid: r.uuid, xml: r.xml_original || null }));
+}
+
 export interface CreateCfdiData {
   uuid: string;
   type: 'EMITIDO' | 'RECIBIDO';