test: document official inscriber execute limitation

[kantorcodes]

Summary

• add a live inscriber integration that exercises the official Hiero SDK submit path for third-party payer inscription transfers
• prove the official TransactionFromBytes + AddSignatureV2 + Execute path still fails with INVALID_SIGNATURE
• prove the existing ExecuteTransaction path succeeds on the exact same payload

Verification

• go test ./pkg/inscriber -run TestInscriberIntegration_OfficialSDKPresignedTransferExecute -count=1
• RUN_INTEGRATION=1 RUN_INSCRIBER_INTEGRATION=1 go test ./pkg/inscriber -run TestInscriberIntegration_OfficialSDKPresignedTransferExecute -count=1 -v
• RUN_INTEGRATION=1 go test ./pkg/hcs27 -run "TestHCS27Integration_(CheckpointChain|MetadataOverflowUsesHRL)" -count=1 -v

Notes

• live testnet verification used the funded existing operator account from repo .env
• no secrets were committed or inlined

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 file)

• pkg/inscriber/integration_official_sdk_test.go

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_{Reviewed by minimax-m2.5-20260211 · 242,768 tokens}

[gemini-code-assist]

Code Review

This pull request introduces a new integration test, TestInscriberIntegration_OfficialSDKPresignedTransferExecute, in pkg/inscriber/integration_official_sdk_test.go. The test verifies the behavior of presigned transfer transactions for inscriptions, confirming that the official Hedera SDK's Execute method fails as expected with an INVALID_SIGNATURE error for third-party payer transfers, while the custom ExecuteTransaction function succeeds. I have no feedback to provide.