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

test/find-null-agent.js

@@ -0,0 +1,24 @@
+const mongoose = require('mongoose');
+
+async function main() {
+  const LOCAL_URI = 'mongodb://127.0.0.1:27017/backone_dpi';
+  await mongoose.connect(LOCAL_URI);
+  const db = mongoose.connection.db;
+  
+  console.log('--- Summaries with null/empty agent_uuid ---');
+  const nullSummaries = await db.collection('summaries').find({
+    $or: [
+      { agent_uuid: null },
+      { agent_uuid: '' },
+      { agent_uuid: { $exists: false } }
+    ]
+  }).toArray();
+  
+  console.log(`Found ${nullSummaries.length} documents:`);
+  nullSummaries.forEach(s => {
+    console.log(`_id: ${s._id}, timestamp: ${s.timestamp}, site_uuid: ${s.site_uuid}, agent_label: ${s.agent_label}`);
+  });
+  
+  await mongoose.disconnect();
+}
+main();