Michael Schimmel
3ff7ba9d59
The `NodeIdentity` struct has been refactored to use a unique `id` field generated by an atomic counter. This ensures that each `NodeIdentity` instance is distinct, even if it has the same `SourceLocation`. The `location` field is now optional, allowing for anonymous nodes. This change improves the reliability of identity comparisons and provides a more robust way to manage AST node identities.