fix: resolve DNS locally and try all IPs via SOCKS5

Many SOCKS5 proxies cannot resolve hostnames reliably. Resolve
locally and iterate through all returned addresses until one
succeeds. Also exclude personal config from git.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -15,3 +15,6 @@ build/
 .pytest_cache/
 .mypy_cache/
 *.log
+
+# Personal config (keep example only)
+config/bouncer.toml