Add gRPC proto JSON transaction results

[hayes-mysten]

Description

• Add top-level SuiGrpcClient transaction include/result types for include: { protoJson: true }.
• Serialize executed transaction and simulation protobuf responses with generated protobuf JSON.
• Keep GrpcCoreClient's public type surface on the shared core transaction result types while supporting the extra include at runtime.
• Align the transaction read-mask helper shape with PR Add core query APIs (listTransactions/listEvents/listCheckpoints) backed by new gRPC List RPCs #1137's transactionReadMaskPaths(include, prefix?).

Test plan

• pnpm --filter @mysten/sui vitest run test/unit/grpc/parse-transaction-response.test.ts
• pnpm --filter @mysten/sui test:typecheck
• pnpm --filter @mysten/sui build

---

AI Assistance Notice

Please disclose the usage of AI. This is primarily to help inform reviewers of how careful they need to review PRs, and to keep track of AI usage across our team. Please fill this out accurately, and do not modify the content or heading for this section!

• This PR was primarily written by AI.
• I used AI for docs / tests, but manually wrote the source code.
• I used AI to understand the problem space / repository.
• I did not use AI for this PR.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
sui-typescript-docs	Ignored	Preview	Jul 16, 2026 9:25pm

[hayes-mysten]

@clud-bot review

[clud-bot]

Review sub-agent spawned. I'll wait for its verdict and then post to GitHub.

[clud-bot]

Review: Approve ✅

Clean, low-risk refactor plus an additive feature. The read-mask helper extraction is byte-for-byte equivalent to the three inline blocks it replaces, withProtoJson correctly adds the opt-in protoJson field only when requested, the conditional ProtoJson typing and as Promise<...> casts hold, and cross-client consistency is preserved (protoJson is a gRPC-only additive include, defaults off).

Verified locally:

• vitest run test/unit/grpc/parse-transaction-response.test.ts — ✅ 3/3
• pnpm --filter @mysten/sui build — ✅
• pnpm --filter @mysten/sui test:typecheck — ✅

One minor note inline: the changeset bump level looks like it should be minor rather than patch since new public API is exported.