feat(source2): push all latest files - device labeling, help system, proxy docs, database isolation fix

- Added DOKUMENTASI-FILTER-PER-SITE.md (site isolation docs)
- Fixed start-with-env.js to force-load .env.production
- Fixed MONGODB_URI hostname from mongodb-netify to mongodb.prod.proit.id
- Updated .gitignore to exclude sensitive scripts and credential files
- Minor UI and labeling improvements

backend/check_devices.js

@@ -0,0 +1,3 @@
+const db = require('better-sqlite3')('backend/netify_data.db');
+console.log('Devices:', db.prepare("SELECT * FROM devices WHERE ip_address = '192.168.9.2'").all());
+console.log('Discovery:', db.prepare("SELECT * FROM intel_device_discovery WHERE ip_address = '192.168.9.2'").all());