Can't get telegram channel from k8s - FetchError: [GET] ...: <no response> fetch failed

### Routes

```routes
/telegram/channel/:username/:routeParams?
```

### Full routes

```fullroutes
/telegram/channel/awesomeRSSHub
```

### Related documentation

https://docs.rsshub.app/routes/popular#channel

### What is expected?

I can get contents of the channel

### What is actually happening?

```
FetchError: [GET] "https://t.me/s/awesomeRSSHub": fetch failed
Route: /telegram/channel/:username/:routeParams?
Full Route: /telegram/channel/awesomeRSSHub
Node Version: v22.20.0
Git Hash: e03111c5
Git Date: Sun, 19 Oct 2025 16:06:18 GMT
```

I can curl from inside the container:
```
kubectl exec -n media rsshub-0 -it -- sh
Defaulted container "rsshub" out of: rsshub, browserless
# curl https://t.me/s/awesomeRSSHub

....
```

Complete log:
```
info: <-- GET /telegram/channel/awesomeRSSHub
debug: Matched route: /telegram/channel/:username/:routeParams?
debug: Outgoing request: GET https://t.me/s/awesomeRSSHub
error: Request https://t.me/s/awesomeRSSHub fail: AggregateError TypeError: fetch failed
debug: Outgoing request: GET https://t.me/s/awesomeRSSHub
error: Request https://t.me/s/awesomeRSSHub fail: AggregateError TypeError: fetch failed
debug: Outgoing request: GET https://t.me/s/awesomeRSSHub
error: Request https://t.me/s/awesomeRSSHub fail: AggregateError TypeError: fetch failed
error: Error in /telegram/channel/awesomeRSSHub: FetchError: [GET] "https://t.me/s/awesomeRSSHub": fetch failed
info: --> GET /telegram/channel/awesomeRSSHub 503 3s
```

### Deployment information

Self-hosted

### Deployment information (for self-hosted)

k3s kubernetes on bare-metal alpine host

### Additional info

```shell
Container image ghcr.io/diygod/rsshub:chromium-bundled-2025-10-19" (both with and without chrome).
```

### This is not a duplicated issue

- [x] I have searched [existing issues](https://github.com/DIYgod/RSSHub/issues) to ensure this bug has not already been reported