feat(electron): load epg worker from asar.unpacked in prod

Update EPG worker path handling and unpack worker files for production
builds so the worker can be spawned when the app is packaged with ASAR.
- Change workerPath to let and, when the resolved path includes
  app.asar, replace it with app.asar.unpacked. This ensures the spawned
  worker points to the unpacked resource in production.
- Add electron-builder asarUnpack pattern for workers/** so worker files
  are packaged outside the ASAR archive.
These changes fix runtime errors where worker threads cannot be started
from inside app.asar and ensure the EPG parser can run in packaged apps.

apps/electron-backend/src/app/events/epg.events.ts

@@ -97,12 +97,17 @@ export default class EpgEvents {
         }
 
         return new Promise((resolve, reject) => {
-            const workerPath = path.join(
+            let workerPath = path.join(
                 __dirname,
                 'workers',
                 'epg-parser.worker.js'
             );
 
+            // Handle asar unpacked files in production
+            if (workerPath.includes('app.asar')) {
+                workerPath = workerPath.replace('app.asar', 'app.asar.unpacked');
+            }
+
             console.log(this.loggerLabel, 'Creating worker for:', url);
             console.log(this.loggerLabel, 'Worker path:', workerPath);