ING-1451: Add support for VBUUID to CheckDocument

[chvck]

No description provided.

[Copilot]

Pull request overview

Adds vBucket UUID (VBUUID) divergence handling to the XDCR CheckDocument RPC so callers can detect vbucket history mismatches and receive a structured VBUUID_MISMATCH error.

Changes:

• Pass optional VbUuid from CheckDocumentRequest into KV GetMeta via GetMetaOptions.VBUUID and map ErrVbucketUUIDMismatch to an aborted gRPC status with VBUUID_MISMATCH details.
• Add CheckDocument integration tests covering VBUUID mismatch scenarios.
• Bump github.com/couchbase/goprotostellar dependency revision.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
gateway/dataimpl/server_v1/xdcrserver.go	Threads VbUuid into GetMeta and maps vbuuid mismatch errors to a structured status.
gateway/test/xdcr_test.go	Adds CheckDocument tests expecting VBUUID_MISMATCH error details.
go.mod	Updates goprotostellar version.
go.sum	Updates sums for the goprotostellar version bump.
testutils/config.go	Changes default Couchbase connstr (appears unrelated to PR purpose).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.