Add checkpoint artifacts digest with merkle trees and gRPC support

[mskd12]

Description

• Introduce checkpoint artifacts digest to checkpoint summary. Currently covers object changes, tx digests and effects digests. What more should we add?
• Introduces merkle tree implementation in shared-crypto (could be moved to fastcrypto to avoid duplication as the implementation is copied from Walrus).
• Update sui-rust-sdk repo and proto files
• (To-do) Port changes to the sui-light-client crate
• (To-do) Build the tree over sorted keys so that non-inclusion proofs become possible

Test plan

• Added grpc-reader crate for testing (will be removed in the final PR)
• Tested that the commitment is being returned via gRPC while it is not yet working with Rust SDK (to be fixed if needed before we merge)

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Release notes

Check each box that your changes affect. If none of the boxes relate to your changes, release notes aren't required.

For each box you select, include information after the relevant heading that describes the impact of your changes that a user might notice and any actions they must take to implement updates.

• [ ] Protocol:
• [ ] Nodes (Validators and Full nodes):
• [ ] gRPC:
• [ ] JSON-RPC:
• [ ] GraphQL:
• [ ] CLI:
• [ ] Rust SDK:

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Project	Deployment	Preview	Comments	Updated (UTC)
sui-docs	Ready	Preview	Comment	Aug 28, 2025 7:27pm

2 Skipped Deployments

Project	Deployment	Preview	Comments	Updated (UTC)
multisig-toolkit	Ignored	Preview		Aug 28, 2025 7:27pm
sui-kiosk	Ignored	Preview		Aug 28, 2025 7:27pm

[lxfind]

Would this require a protocol config change? Also highly recommend to split the PR so that each team could review the relevant part.