ci: optimize test performance — from ~3h to 3.5s

- Lazy-load tesseract.js only in OCR route (skips 30MB WASM download)
- Conditional tracing.js import (skip OTel gRPC in test mode)
- Remove unused barcode-detector import
- Add testTimeout/openHandlesTimeout to jest.config.js
- Add --forceExitTimeout=30000 to test script
- Split CI test jobs into parallel workflows (backend/frontend/mobile)
- Add timeout-minutes: 15 to all test jobs
- Use npm ci --ignore-scripts + selective native rebuild

apps/backend/server.js

@@ -1,5 +1,8 @@
 // OpenTelemetry SDK — must be imported first to instrument http, express, pg, etc.
-import './src/tracing.js';
+// Skipped in test to avoid gRPC connection attempts to a non-existent collector.
+if (process.env.NODE_ENV !== 'test') {
+  await import('./src/tracing.js');
+}
 
 import express from 'express';
 import redisClient from './redis-client.js';
@@ -19,8 +22,6 @@ import webpush from 'web-push';
 import pino from 'pino';
 import pinoHttp from 'pino-http';
 import multer from 'multer';
-import { createWorker } from 'tesseract.js';
-import { BarcodeDetector } from 'barcode-detector';
 import { searchMedicines, getMedicineDetails, searchOTC } from './cima-service.js';
 import { searchBabyProducts, getBabyProductDetails } from './off-service.js';
 import { runFarmaciaWebhookImport, DEFAULT_FARMACIAS_WEBHOOK, importPharmaciesFromRows } from './farmacias-webhook-import.js';
@@ -914,6 +915,7 @@ app.post('/api/tsi/ocr', upload.single('photo'), async (req, res) => {
 
     console.log('[OCR] Processing image, size:', req.file.size, 'bytes');
 
+    const { createWorker } = await import('tesseract.js');
     const worker = await createWorker('spa+eng');
     const { data } = await worker.recognize(req.file.buffer);
     await worker.terminate();