chore: add data volume and cProfile to compose

Mount ~/.cache/s5p as /data for pool state and profile output.
Enable cProfile by default, dumping to /data/s5p.prof.

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

compose.yaml

@@ -10,4 +10,6 @@ services:
     volumes:
       - ./src:/app/src:ro,Z
       - ./config/s5p.yaml:/app/config/s5p.yaml:ro,Z
+      - ~/.cache/s5p:/data:Z
+    command: ["-c", "/app/config/s5p.yaml", "--cprofile", "/data/s5p.prof"]
     network_mode: host