Fix B200 Grafana dashboard routing to pirate cluster

[aas008]

Summary

• Updates GRAFANA_DASHBOARDS["B200"] to point to b200-pirate-vllm-dcgm instead of the old psap-b200-mlperf dashboard (cluster no longer exists)
• Removes dead B200_PIRATE entry — no CSV row ever has accelerator=B200_PIRATE since Forge produces accelerator=B200 via gpu_type.upper()

Context

All 4042 B200 runs in the CSV have accelerator=B200. The routing was pointing to the old psap-b200-mlperf Grafana dashboard which has no metrics. The correct dashboard is b200-pirate-vllm-dcgm.

Test plan

• Verify B200 runs on staging dashboard link to the correct Grafana dashboard
• Confirm existing B200 run Grafana links open b200-pirate-vllm-dcgm

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • B200 runs now link to the pirate Grafana dashboard instead of the MLPerf dashboard.

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ℹ️ Recent review info

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Run ID: 75a78df6-29e2-44e9-8684-2078321859ac

📥 Commits

Reviewing files that changed from the base of the PR and between ef4aa24 and 9c8d2b5.

📒 Files selected for processing (1)

• dashboard.py

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📝 Walkthrough

Walkthrough

The B200 Grafana dashboard mapping now points to the pirate dashboard. The separate B200_PIRATE mapping is removed.

Changes

B200 Grafana Dashboard

Layer / File(s)	Summary
Update B200 dashboard mapping dashboard.py	The B200 mapping now uses the pirate dashboard identifiers. The separate B200_PIRATE entry is removed.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: harshith-umesh

Merge Risk: ⚪ Minimal · up to 9c8d2

B200 links now target the pirate Grafana dashboard. No broken-link or metrics regression is established; staging checks remain outstanding but do not indicate a merge-blocking risk.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: routing B200 Grafana links to the pirate cluster dashboard.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Additional details and impacted files

@@          Coverage Diff           @@
##             main    #102   +/-   ##
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  Coverage        ?   3.48%           
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  Files           ?       8           
  Lines           ?    8329           
  Branches        ?       0           
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  Hits            ?     290           
  Misses          ?    8039           
  Partials        ?       0           

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[Harshith-umesh]

we will still need the old mlperf grafana dashboard, since 3.4-gA runs were done on that cluster.