chore: fix conflicting wrangler.toml entries in backend/.gitignore

Author: ntanwir10

backend/.gitignore

@@ -9,7 +9,6 @@ dist/
 *.d.ts.map
 
 # Except the root config files
-!wrangler.toml
 !package.json
 
 # Wrangler
@@ -45,4 +44,5 @@ supabase/
 !supabase/migrations/.gitkeep
 
 # Scripts - deployment and secrets should stay private
-scripts/
+scripts/
+# wrangler.toml is ignored via root .gitignore (backend/wrangler.toml)