fix(supervisor): run sqlmesh against prod environment

Without the 'prod' argument sqlmesh defaults to dev_<username>, which
doesn't exist on the server (padelnomics_service user).

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

src/padelnomics/supervisor.py

@@ -250,7 +250,7 @@ def run_transform() -> None:
     """Run SQLMesh — it evaluates model staleness internally."""
     logger.info("Running SQLMesh transform")
     ok = run_shell(
-        f"uv run sqlmesh -p transform/sqlmesh_padelnomics run",
+        "uv run sqlmesh -p transform/sqlmesh_padelnomics run prod",
     )
     if not ok:
         send_alert("SQLMesh transform failed")