Restore OCaml to 5c8b05a + Docker native server entrypoint

All OCaml files restored to the last known working state (5c8b05a).
All SX changes preserved and verified working with native server.
Docker compose updated to run sx_server.exe --http directly.

859KB homepage renders, 7/9 pages cached, ~30s startup (JIT fallback).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.dev-sx.yml

@@ -19,6 +19,8 @@ services:
       SX_BOUNDARY_STRICT: "1"
       SX_DEV: "1"
       OCAMLRUNPARAM: "b"
+    entrypoint: ["/app/bin/sx_server", "--http", "8000"]
+    working_dir: /app
     ports:
       - "8013:8000"
     volumes: