fix: compiling And: append selection_child->predicates to predicates

[fengelniederhammer]

LAPIS tests are currently failing, since

{
  "action": {
    "type": "Aggregated"
  },
  "filterExpression": {
    "type": "And",
    "children": [
      {
        "type": "IntBetween",
        "column": "age",
        "from": 51,
        "to": 53
      }
    ]
  }
}

currently always returns Full. This should fix the issue.

Also I found it easier to follow if we have the possibility to trace compilation in the logs. It's quite cluttered, since it happens several times in parallel, but it's better than nothing. There is still room to improve.

[Taepper]

👍🏼