Add Cloudflare detector output screenshot to README

Author: FoxSecIntel

README.md

@@ -42,6 +42,10 @@ The monitor includes:
 - retry and backoff on DNS and HTTP operations
 - status and confidence metadata on each signal
 
+## Cloudflare detector screenshot
+
+![Cloudflare detector terminal output](docs/media/cloudflare-detector-output.jpg)
+
 ## Detection notes and limitations
 
 - Cloudflare detection is signal-based, not authoritative attribution.