docs(benchmarks): correct stale runBenchmark wording in .bench.ts headers

[devin-ai-integration]

Summary

Comments only. After the @benchsdk/client / @benchsdk/runner split, some header docstrings still described the old self-running model ("built on @benchsdk/runner's runBenchmark", "orchestration is owned by ... runBenchmark"). runBenchmark is now internal to the runner and entrypoints are declarative (export const config + export const task, executed via bench run <file>), so the wording is updated to say that.

Files whose comments changed:

• benchmarks/ai-gateway/ai-gateway.bench.ts
• benchmarks/sandbox/dax.bench.ts
• benchmarks/storage/snapshot-fork.bench.ts
• benchmarks/browser/browser-task.ts
• benchmarks/storage/storage-task.ts
• benchmarks/storage/snapshot-fork-task.ts (the three *-task.ts files just drop the internal runBenchmark name, keeping "orchestration is owned by @benchsdk/runner")

No code, signatures, exports, config values, files, or structure changed; benchmarks/scale/** untouched. pnpm typecheck passes.

 benchmarks/ai-gateway/ai-gateway.bench.ts | 15 ++++++++-------
 benchmarks/browser/browser-task.ts        |  3 +--
 benchmarks/sandbox/dax.bench.ts           | 11 ++++++-----
 benchmarks/storage/snapshot-fork-task.ts  |  4 ++--
 benchmarks/storage/snapshot-fork.bench.ts |  4 ++--
 benchmarks/storage/storage-task.ts        |  3 +--
 6 files changed, 20 insertions(+), 20 deletions(-)

Left unchanged (historical context, not the old run model — flagging for a human): references to the removed run.ts in benchmarks/storage/*.bench.ts, benchmarks/ai-gateway/ai-gateway.bench.ts, and benchmarks/src/merge-results.ts.

Link to Devin session: https://app.devin.ai/sessions/e0be51dd272f40d5997335584c1270b3
Requested by: @HeyGarrison

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✅ Devin Review: No Issues Found

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

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[devin-ai-integration]

Superseded — rolled into the workload-inlining PR.