Incorrect inferred parent in `new {}` expression

This snippet throws:

```pkl
class Foo {
bar: Listing(!isEmpty)

foo: Listing = bar
}

foo: Foo = new {
bar = new Listing { 1; 2; 3 }
foo = new {
qux
}
}
```

Produces error:

```
–– Pkl Error ––
Type constraint `!isEmpty` violated.
Value: new Listing {}

!isEmpty
││
│true
false

2 | bar: Listing(!isEmpty)
^^^^^^^^
at test#Foo.bar (/Users/danielchao/code/apple/pkl/.dan-scripts/test.pkl:2)

2 | bar: Listing(!isEmpty)
^^^
at test#Foo.bar (/Users/danielchao/code/apple/pkl/.dan-scripts/test.pkl:2)

3 | foo: Listing = bar
^^^
at test#Foo.foo (/Users/danielchao/code/apple/pkl/.dan-scripts/test.pkl:3)

132 | renderer.renderDocument(value)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at pkl.base#Module.output.text (https://github.com/apple/pkl/blob/0.31.0/stdlib/base.pkl#L132)

136 | if (renderer is BytesRenderer) renderer.renderDocument(value) else text.encodeToBytes("UTF-8")
^^^^
at pkl.base#Module.output.bytes (https://github.com/apple/pkl/blob/0.31.0/stdlib/base.pkl#L136)
```

Start by running the provided Pkl snippet and compare the inferred parent for the nested `new {}` expression with the reported empty `Listing` value. Trace the compiler or evaluator path that resolves the parent of `foo` and verify that the `bar: Listing(!isEmpty)` constraint is satisfied without producing the shown error.

Written by the indexing model from the issue text.