Fix multi-turn traces merging when prefix_caching differs in runtime_args (main)

[aas008]

Summary

• Multi-turn benchmark data has prefix_caching = NaN even when runs differ in prefix caching config
• The differentiating info is in runtime_args (e.g., no-enable-prefix-caching: True vs False)
• This caused Performance Plots to merge distinct runs into a single zigzag trace

Fix

After existing prefix_caching fillna/astype preprocessing, backfill empty values from runtime_args:

• no-enable-prefix-caching: True → prefix_caching = "no" (caching OFF)
• no-enable-prefix-caching: False → prefix_caching = "yes" (caching ON)

Verification

Tested against staging CSV:

• Before: All 17 multi-turn rows had prefix_caching = NaN
• After: Rows correctly labeled "no" or "yes" based on runtime_args, producing separate trace keys

Test plan

• Run ruff check dashboard.py — passes clean
• Load dashboard and verify multi-turn traces no longer merge into zigzag lines
• Verify single-turn rows (which already have prefix_caching set) are unaffected

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved dashboard data handling by filling in missing prefix-caching status from available runtime settings.
  • Correctly identifies whether prefix caching is enabled or disabled when the status is not explicitly provided.

[coderabbitai]

📝 Walkthrough

Walkthrough

load_data now fills empty prefix_caching values by parsing runtime_args for no-enable-prefix-caching: and mapping its boolean value to "no" or "yes".

Changes

Prefix caching data enrichment

Layer / File(s)	Summary
Runtime argument backfill dashboard.py	Adds parsing of no-enable-prefix-caching: tokens and applies the derived prefix-caching value only to rows with non-null runtime arguments and empty existing values.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main fix: preventing multi-turn trace merging by deriving prefix_caching from runtime_args.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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Codecov Report

❌ Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@cf066be). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
dashboard.py	0.00%	10 Missing ⚠️
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Additional details and impacted files

@@          Coverage Diff           @@
##             main     #53   +/-   ##
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  Coverage        ?   3.46%           
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  Files           ?       8           
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  Hits            ?     289           
  Misses          ?    8053           
  Partials        ?       0           

Flag	Coverage Δ
unittests	3.46% <0.00%> (?)

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