feat(cfdi): add autocomplete for emisor and receptor filters

- Add /cfdi/emisores and /cfdi/receptores API endpoints
- Search by RFC or nombre with ILIKE
- Show suggestions dropdown while typing (min 2 chars)
- Click suggestion to select and populate filter input
- Show loading state while searching

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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

@@ -387,6 +387,28 @@ export async function deleteCfdi(schema: string, id: string): Promise<void> {
   await prisma.$queryRawUnsafe(`DELETE FROM "${schema}".cfdis WHERE id = $1`, id);
 }
 
+export async function getEmisores(schema: string, search: string, limit: number = 10): Promise<{ rfc: string; nombre: string }[]> {
+  const result = await prisma.$queryRawUnsafe<{ rfc: string; nombre: string }[]>(`
+    SELECT DISTINCT rfc_emisor as rfc, nombre_emisor as nombre
+    FROM "${schema}".cfdis
+    WHERE rfc_emisor ILIKE $1 OR nombre_emisor ILIKE $1
+    ORDER BY nombre_emisor
+    LIMIT $2
+  `, `%${search}%`, limit);
+  return result;
+}
+
+export async function getReceptores(schema: string, search: string, limit: number = 10): Promise<{ rfc: string; nombre: string }[]> {
+  const result = await prisma.$queryRawUnsafe<{ rfc: string; nombre: string }[]>(`
+    SELECT DISTINCT rfc_receptor as rfc, nombre_receptor as nombre
+    FROM "${schema}".cfdis
+    WHERE rfc_receptor ILIKE $1 OR nombre_receptor ILIKE $1
+    ORDER BY nombre_receptor
+    LIMIT $2
+  `, `%${search}%`, limit);
+  return result;
+}
+
 export async function getResumenCfdis(schema: string, año: number, mes: number) {
   const result = await prisma.$queryRawUnsafe<[{
     total_ingresos: number;