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/controllers/cfdi.controller.ts

@@ -67,6 +67,42 @@ export async function getXml(req: Request, res: Response, next: NextFunction) {
   }
 }
 
+export async function getEmisores(req: Request, res: Response, next: NextFunction) {
+  try {
+    if (!req.tenantSchema) {
+      return next(new AppError(400, 'Schema no configurado'));
+    }
+
+    const search = (req.query.search as string) || '';
+    if (search.length < 2) {
+      return res.json([]);
+    }
+
+    const emisores = await cfdiService.getEmisores(req.tenantSchema, search);
+    res.json(emisores);
+  } catch (error) {
+    next(error);
+  }
+}
+
+export async function getReceptores(req: Request, res: Response, next: NextFunction) {
+  try {
+    if (!req.tenantSchema) {
+      return next(new AppError(400, 'Schema no configurado'));
+    }
+
+    const search = (req.query.search as string) || '';
+    if (search.length < 2) {
+      return res.json([]);
+    }
+
+    const receptores = await cfdiService.getReceptores(req.tenantSchema, search);
+    res.json(receptores);
+  } catch (error) {
+    next(error);
+  }
+}
+
 export async function getResumen(req: Request, res: Response, next: NextFunction) {
   try {
     if (!req.tenantSchema) {