fix: update admin token check logic and improve comments for clarity

feat: add condition to only delete manually added stocks from DB
docs: clarify stock notes saving method and Alpaca mode indicator fetching
chore: update binary database file

app/routes/analyze.tsx

@@ -354,6 +354,7 @@ export default function Analyze() {
     const stock = stocks.find((s) => s.id === id);
     if (!stock) return;
 
+    // Only delete from DB if it was manually added (db- prefix), not Alpaca positions
     if (id.startsWith("db-")) {
       try {
         const formData = new FormData();