Invalid references reported

Given smithy files like this:

```
# file 1
structure SomeStruc {
  id: Session_Id
}
```

```
# file 2
@uuidFormat
string Session_Id
```


```
# file 3
/// Session data
structure Session {
  account: Account,
  identity: SessionIdentity
}
```

When hovering or clicking to definition on `Session_Id`, it points to the file `#3` Session structure instead