Add clinical triage pipeline notebook for NMP v2

[mvansegbroeck]

Summary

• Add an end-to-end clinical triage pipeline notebook using NeMo Data Designer and NeMo Evaluator
• Part 1 (Data Designer): Generate synthetic ESI-labeled nurse triage notes, score quality with LLM-as-a-Judge, filter and save to JSONL
• Part 2 (Evaluator): Run inference via NMP Gateway, score with string-check metric, compare accuracy by ESI level and complexity

Details

• Use case: Predict Emergency Severity Index (ESI) levels from synthetic triage notes
• Models: Nemotron Nano 30B (generator), Nemotron Super 120B (judge)
• Evaluation compares two models across 5 ESI levels and 3 complexity tiers

Test plan

• Run notebook end-to-end against NMP v2 instance
• Verify Data Designer preview and batch generation
• Verify Evaluator scoring and accuracy plots