feat(wasm-bench): BrowserStack Chonk bench as a ci3 job

[AztecBot]

Summary

Adds a BrowserStack-backed wasm-bench CI3 mode for Chonk proving through the standard bbapi wasm path. The CI setup downloads the pinned Chonk inputs early, builds barretenberg.wasm.gz, runs the BrowserStack matrix, and publishes wasm-bench artifacts.

This is a public port of the private PR AztecProtocol/aztec-packages-private#92. The pinned-Chonk-input refresh it was stacked on is already present on public next (barretenberg/cpp/scripts/chonk_inputs.sh), so only the wasm-bench delta is ported here.

Port mechanics

• Generated as the base..head delta of the private PR (45 files, matching the source PR's changed-file set) and applied onto next with a 3-way merge.
• The modifications to bootstrap.sh / ci.sh were re-applied on top of the current public next versions (those files had diverged from the private base), so the result is public next + PR hunks, not a blind blob copy. The new wasm-bench files (including yarn.lock) are byte-identical to the source.

Verification (in this checkout)

• bash -n bootstrap.sh ci.sh .github/ci3_labels_to_env.sh barretenberg/wasm-bench/bootstrap.sh barretenberg/wasm-bench/scripts/run-ci-bench.sh barretenberg/wasm-bench/scripts/upload-rkapp-artifacts.sh -> OK
• git diff --check -> clean (no whitespace errors)
• Patch applied with 0 reject files; barretenberg/wasm-bench/yarn.lock sha256 matches the source PR head
• bootstrap.sh ci-wasm-bench mode and ci.sh wasm-bench / gh-wasm-bench-artifacts cases confirmed present

To run the matrix in CI, add the ci-wasm-bench label (requires BROWSERSTACK_USERNAME / BROWSERSTACK_ACCESS_KEY in the remote env). Original private run: passed in 13m59s across 8 targets.

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Created by claudebox · group: slackbot

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​webpack@​5.106.2
	npm/​webpack-cli@​5.1.4
	npm/​ts-loader@​9.5.7
	npm/​html-webpack-plugin@​5.6.7
	npm/​msgpackr@​1.11.12

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