fix(supervisor): use sqlmesh plan --auto-apply instead of run

'run' requires the prod environment to already exist. 'plan --auto-apply'
initializes the environment on first run and applies pending changes on
subsequent runs — fully self-healing.

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(
-        "uv run sqlmesh -p transform/sqlmesh_padelnomics run prod",
+        "uv run sqlmesh -p transform/sqlmesh_padelnomics plan prod --auto-apply",
     )
     if not ok:
         send_alert("SQLMesh transform failed")