Check Headroom proxy status and token savings.
First check if Headroom is running:
```bash
curl -s -m 2 http://127.0.0.1:8787/health
```
If running, show detailed stats:
```bash
Present the results showing:
- ---
If Headroom is not running, respond with:
"Headroom is offline. To install and start: `pip install headroom-ai && headroom proxy`"