structure: sync docs/OPERATIONS.md

docs/OPERATIONS.md

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+# Operations (day-2)
+
+**Status:** Outline.
+
+## Operator commands (when implemented)
+
+```bash
+./scripts/doctor.sh
+nemohermes <sandbox-name> status
+nemohermes <sandbox-name> logs --follow
+docker compose -f deploy/compose/docker-compose.yml logs
+```
+
+## Log levels
+
+| Level | Default | Use |
+|-------|---------|-----|
+| production | Yes | Redacted events, errors, health |
+| debug | Off | Operator troubleshooting |
+| trace | Off | Dev only |
+
+## Updates
+
+[UPGRADE.md](UPGRADE.md) · [design/updates-lifecycle.md](../design/updates-lifecycle.md)