fix(pusher): improve welist response logging, error handling, and add request timeout

- Always log HTTP status code and response body from welist (info level)
- Log send_stats_report errors at call site instead of silently discarding
- Add 10s timeout to reqwest client to prevent indefinite hangs
- Apply clippy fixes (is_empty, if-let chains, dead_code, etc.)

.gitignore

@@ -8,9 +8,6 @@
 .env.production
 .env.secret
 
-# Shell scripts that load env vars (contain secrets, local only)
-bal-pusher.sh
-bal-server.sh
 
 # Private keys - NEVER commit to git
 # Only public_key.pem should be tracked (if needed)