refactor: rename the native benchmark set to Kepler

[abhinav-pola]

TL;DR

The TS benchmark harness is now called Kepler. This PR renames the harness-specific "native" identifiers to match.

What changed?

• NativeBenchmarkRunConfigSchema / NativeBenchmarkRunConfig → KeplerBenchmarkRunConfigSchema / KeplerBenchmarkRunConfig
• isNativeBenchmarkConfig → isKeplerBenchmarkConfig, and the private NATIVE_BENCHMARK_ID_SET / NativeModelBenchmarkConfig get the same rename
• run-by-id renames nativeBenchmark → keplerBenchmark, and the injected-id error messages now say "Kepler benchmark"
• package.json description updated

Not changed, because these uses of "native" mean something else:

• WebSearchEngine.Native and the draco/search "native" engine values, which are OpenRouter's native web search
• @typescript/native
• bench-worker-native in the logger tests, which is the deployed Cloud Run resource name and will be renamed separately if at all

Why?

"Native" was too generic a name for the harness, so it now has a proper noun (Kepler), alongside Harbor.

How to test

rg -n 'NativeBenchmarkRunConfig|isNativeBenchmarkConfig' src returns nothing. There is no behavior change.

Reviewer focus

• This is a breaking rename of public exports with no aliases. Nothing in the openrouter-web subtree consumer imports these names outside packages/bench-harness, so the next subtree pull needs no follow-up edits.

Checklist

• Tests cover changed behavior
• Public API or configuration changes are backward compatible, or the break is documented
• Benchmark changes document dataset provenance and licensing (n/a)
• No credentials, private results, or restricted dataset contents are included
• Documentation is updated where needed

Link to Devin session: https://openrouter.devinenterprise.com/sessions/26aed72e72b94648bcafa700baf71832
Open in Devin Desktop: https://openrouter.devinenterprise.com/desktop/session/26aed72e72b94648bcafa700baf71832?variant=devin
Requested by: @abhinav-pola

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[devin-ai-integration]

I'll fix CI failures and address comments from users with write access that start with 'DevinAI' or '@devin'.

• Disable automatic comment, CI, and merge conflict monitoring

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Original prompt from Abhinav

SYSTEM:
<latest_message>
Abhinav Pola (U090K0G7JF3) [ts=1790381041.747209]: @Devin instead of "native" we need to call our TS benchmark harness something else. come up with a cool name
</latest_message>

=== BEGIN THREAD HISTORY (in #agents-benchmarks) ===
Abhinav Pola (U090K0G7JF3) [ts=1790381041.747209]: @Devin instead of "native" we need to call our TS benchmark harness something else. come up with a cool name
=== END THREAD HISTORY ===
Channel ID: C0BAKP8P5C3
Thread URL: https://openrouter.slack.com/archives/C0BAKP8P5C3/p1790381041747209?thread_ts=1790381041.747209&amp;cid=C0BAKP8P5C3

The <latest_message> is the message that you should use to guide your goals + task for this session, and you should use the rest of the slack thread as context.
A [ts=...] marker on a Slack message is that message's timestamp. To act on a specific message with the slack tool (e.g. adding an emoji reaction via the reaction command), pass that value as timestamp along with the Channel ID — no extra lookup call is needed.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.