docs: document data volume mount and container profiling

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

docs/CHEATSHEET.md

@@ -26,6 +26,8 @@ make logs    # podman-compose logs -f
 make down    # podman-compose down
 ```
 
+Volumes: `./src` (ro), `./config/s5p.yaml` (ro), `~/.cache/s5p` → `/data` (pool state + profiles)
+
 ## Config
 
 ```bash
@@ -92,7 +94,9 @@ curl --max-time 30 -x socks5h://127.0.0.1:1080 https://example.com
 ## Profiling
 
 ```bash
+# Enable in compose.yaml: uncomment the command line
 python -m pstats s5p.prof                   # interactive stats viewer
+python -m pstats ~/.cache/s5p/s5p.prof      # container profile output
 ```
 
 ## Metrics Log