fix: copy large files to destination bucket

[goanpeca]

Summary

• Forward the resolved destination bucket id through shared copy options used by both small-file and large-file copy paths.
• Keep large-file-only signal handling explicit while preventing future drift in the common copy contract.
• Add simulator-backed large cross-bucket regression coverage that verifies copied size and bucket state without pinning a concrete SDK method call.
• Rebuild dist for the action entrypoint.

Linked issue

Fixes #109

Tests run

• pnpm vitest run __tests__/commands/copy-cross-bucket.test.ts __tests__/coverage-stress.test.ts --testNamePattern "copy"
• pnpm vitest run __tests__/commands/copy-cross-bucket.test.ts
• pnpm typecheck
• pnpm lint
• pnpm test
• pnpm build
• pnpm verify-dist
• pre-commit hook: lint, release provenance policy, typecheck, vitest, ncc build, cspell
• pre-push hook: vitest --coverage

Follow-up notes

• No new user-facing input was added; this keeps the large-file copy path consistent with the existing small-file copy behavior.

[github-actions]

Build artifact for this PR: build.tar.gz (valid 1 hour)

[Copilot]

Pull request overview

This pull request fixes a cross-bucket copy bug specific to the large-file (multipart) copy path by ensuring the resolved destination bucket ID is forwarded to the SDK call, and adds a simulator-backed regression test to prevent regressions. This keeps behavior consistent between the small-file and large-file copy implementations.

Changes:

• Forward destinationBucketId to copyLargeFile when copying across buckets.
• Add a simulator-based test that forces the large-file copy path and verifies the destination bucket is honored.
• Rebuild dist/index.js to reflect the source changes in the published action bundle.

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
src/commands/copy.ts	Wires destinationBucketId through to the large-file copy call for cross-bucket copies.
tests/commands/copy-cross-bucket.test.ts	Adds a regression test that forces multipart/large copy and asserts the destination bucket is used.
dist/index.js	Updates the bundled action output to include the source fix.

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[github-actions]

Build artifact for this PR: build.tar.gz (valid 1 hour)

[Copilot]

Pull request overview

Copilot reviewed 2 out of 4 changed files in this pull request and generated no new comments.

[github-actions]

Build artifact for this PR: build.tar.gz (valid 1 hour)

[Copilot]

Pull request overview

Copilot reviewed 2 out of 4 changed files in this pull request and generated no new comments.