add API logic to get model hash values ​​based on the property status of the custom node

[hopeman1986]

When generating workflow_api.json in API mode, add logic to get model hash values ​​based on the property status of the custom node ("SaveAllModelHashesNode").

if adding a custom node (SaveAllModelHashesNode) to the diagram to extract model hash values, the logic to get this model hash value is executed in the workflow_api.json generation

if we don't add a cutom node, when creating workflow_api.json, all operations will be the same with previous operation

[hopeman1986]

Hi

When I create workflow_api.json in API mode, I have a custom node SaveAllModelHashesNode and if the save_hash flag is true, I wanted to use the "/api/get_hash" request to get the sha256 model hash value.

In the logic for the "Save (API format)" button of ComfyUI_frontend, there is no APIs to communicate with the server.

So I added this "/api/get_hash" API to the logic for the "Save (API format)" button of ComfyUI_frontend.

Can you please tell me what I can do about this issue?

[mcmonkey4eva]

While model hash data is useful information that would be nice to have APIs for, I don't think this PR is written with experienced intention to effectively build that, this looks more like a personal specific idea you're shoving into the core when it should probably be an extension instead