decommission(F3): suspender cronjobs metrics-retention y outcomes-joiner

Sin bot ni postgres ya no hay nada que retener ni joinear; suspend en vez
de borrar para conservar la definición durante la semana de gracia.

polymarket-bot/cronjob-outcomes.yaml

@@ -13,6 +13,7 @@ spec:
   # the upsert is idempotent per market_id (ON CONFLICT DO UPDATE) and the
   # fetch only queries markets that still lack an outcome.
   schedule: "30 0 * * *"
+  suspend: true
   concurrencyPolicy: Forbid
   successfulJobsHistoryLimit: 3
   failedJobsHistoryLimit: 3