[bug]: SDXL models missing from core metadata node's model selector

[JPBarringer]

[bug]: SDXL models missing from core metadata node's model selector

[psychedelicious]

This node is an internal implementation detail, designed for programmatic use in the UI. We got requests for it to be made visible in the UI so we un-hid it, but this node should have a big asterisk on it.

In v4, this node changes, and these inputs are nonfunctional:

And these inputs have "incorrect" types:

• rand device
• scheduler
• init image
• hrf method
• refiner scheduler

These inputs have field/data types that are used only for metadata in the linear UI's internal graph building logic. I don't plan to create all the additional logic and UI for those field types.

[psychedelicious]

To address the use-case, we could do something like this:

• Remove (hide) the CoreMetadata node.
• Create a new Metadata Helper node that with a subset of CoreMetadata's inputs. For example, we'd exclude the HRF metadata.
• Add an additional Model Identifier output for all model-selecting nodes. The model identifier is an object that includes model name, base, type, key, hash, and submodel type (e.g. UNet, CLIP, VAE).
• The Metadata Helper node would have a Model and VAE input that accept a Model Identifier.

There would be no "generic" model selection, but you could route the Model Identifier outputs into the Metadata Helper.