chore: clean up GeoIP timeout follow-up (#213)

Remove dead null checks, document CLOAKBROWSER_GEOIP_TIMEOUT_SECONDS
env var, credit contributor.

Fix review findings:
- Use timeout-bounded resolve_proxy_exit_ip in _resolve_webrtc_args
- Add missing timeout handler on tunneled HTTPS request in JS
- Reject nan/inf in Python timeout parsing (parity with JS)
- Recompute deadline after CONNECT succeeds in JS proxy tunnel

README.md

@@ -570,6 +570,7 @@ Access the original un-patched Playwright page at `page._original` if you need r
 | `CLOAKBROWSER_DOWNLOAD_URL` | `cloakbrowser.dev` | Custom download URL for binary |
 | `CLOAKBROWSER_AUTO_UPDATE` | `true` | Set to `false` to disable background update checks |
 | `CLOAKBROWSER_SKIP_CHECKSUM` | `false` | Set to `true` to skip SHA-256 verification after download |
+| `CLOAKBROWSER_GEOIP_TIMEOUT_SECONDS` | `5` | Max seconds for GeoIP resolution before continuing without it |
 
 ## Fingerprint Management
 
@@ -1193,6 +1194,6 @@ Issues and PRs welcome. If something isn't working, [open an issue](https://gith
 - [@yahooguntu](https://github.com/yahooguntu) — persistent contexts
 - [@kitiho](https://github.com/kitiho) — null viewport fix
 - [@eofreternal](https://github.com/eofreternal) — humanConfig type fix, humanized method option types
-- [@manaskarra](https://github.com/manaskarra) — iframe scope fix for humanized frame actions
+- [@manaskarra](https://github.com/manaskarra) — iframe scope fix for humanized frame actions, GeoIP timeout guard
 - [@Youhai020616](https://github.com/Youhai020616) — SOCKS5 credential encoding logging
 - [@AlexTech314](https://github.com/AlexTech314) — AWS Lambda integration