```
row x = 1, y = 2, z = 3 | stats  a = count(*), b = count(*) | stats  c = count(*)
```

The logical optimizer does not seem to be able to handle this query:

```
{
    "error": {
        "root_cause": [
            {
                "type": "rule_execution_exception",
                "reason": "Rule execution limit [100] reached"
            }
        ],
        "type": "rule_execution_exception",
        "reason": "Rule execution limit [100] reached"
    },
    "status": 500
}
```

The problem seems to be limited to this corner case scenario where you have two aggs with the same expression in one STATS and another STATS after that.

The problem is not limited to `count(*)`, also the following fails with the same error

```
row x = 1, y = 2, z = 3 | stats  a = max(x), b = max(x) | stats  c = max(a)
```

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizer.java
ConvertStringToByteRef() {
            super(TransformDirection.UP);
        }
        @Override
        protected Expression rule(Literal lit) {
            if (lit.value() == null) {
                return lit;
            }
            if (lit.value() instanceof String s) {
                return Literal.of(lit, new BytesRef(s));
            }
            if (lit.value() instanceof List<?> l) {
                if (l.isEmpty() || false == l.get(0) instanceof String) {
                    return lit;
                }
                return Literal.of(lit, l.stream().map(v -> new BytesRef((String) v)).toList());
            }
            return lit;
        }
    }
    static class CombineProjections extends OptimizerRules.OptimizerRule<UnaryPlan> {