fix(Moonvalley-API-Nodes): adjust "steps" parameter to not raise exception

[bigcat88]

Default values that we have currently for all three nodes, always raising the exception:

Exception: Polling aborted due to error: Task failed: {"id": "prompt_c12b80fa-b18b-43c8-9bb4-51b3155f290e", "status": "error", "error": {"message": "Value error, warmup_steps (24) + cooldown_steps (36) must be less than steps (59)", "traceback": ""}}

Adjusted the minimal and default values ​​of the "steps" widget to work correctly.

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