fix(api-nodes): use a unique name for uploading audio files

[bigcat88]

1. Removed the filename parameter in the upload_audio_to_comfyapi function, so now it always uploads a file with a unique name. This fixes the situation when two nodes in one workflow can upload audio file to the same object.

2. Removed the name parameter in the tensor_to_bytesio function used for uploading images. It is not used anywhere and should not be used for the same reason as above.

API Node PR Checklist

Scope

• Is API Node Change

Pricing & Billing

• Need pricing update
• No pricing update

If Need pricing update:

• Metronome rate cards updated
• Auto‑billing tests updated and passing

QA

• QA done
• QA not required

Comms

• Informed Kosinkadink