chore: update Hedera protobufs to v0.76.1

[MonaaEid]

Description:
This pull request updates the Hedera protobuf and Hiero SDK versions used throughout the project to v0.76.1.

Version updates:

• Updated the protobuf schema documentation in .coderabbit.yaml to reference hedera-protobufs version v0.76.1 instead of v0.72.0-rc.2.
• Updated the hieroVersion in the GitHub Actions workflows (pr-check-secondary-examples.yml and pr-check-secondary-unit-integration-test.yml) to v0.76.1. * Updated the VERSION constant in generate_proto.py to v0.76.1.
  Related issue(s):

Fixes #2588

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

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[coderabbitai]

Warning

This pull request changes a CodeRabbit configuration file. Because it comes from a fork or its author is not a repository collaborator, reviews use only the configuration from the target branch. The proposed configuration will take effect after it is merged.

Walkthrough

Changes

Protobuf and Hiero version updates

Layer / File(s)	Summary
Update protobuf generation inputs .coderabbit.yaml, generate_proto.py	Schema references and protobuf generation now use v0.76.1. The generator excludes blocks/publish_stream_request_bytes.proto.
Align Hiero Solo workflows .github/workflows/pr-check-secondary-examples.yml, .github/workflows/pr-check-secondary-unit-integration-test.yml	Both workflows now prepare Hiero v0.76.1.

Node account transaction signing

Layer / File(s)	Summary
Retain and apply node account keys examples/nodes/node_create_transaction.py, examples/nodes/node_delete_transaction.py, examples/nodes/node_update_transaction.py, tests/integration/associated_registered_nodes_e2e_test.py	Node creation flows retain the generated node account key and sign node creation transactions with both the administrator key and node account key. node_update_transaction.py passes the key through create_node.

Estimated code review effort: 2 (Simple) | ~15 minutes

Merge Risk: 🔵 Low · up to f1f19

The protobuf version update is localized and mergeable with explicit owner follow-up: the integration test should verify that the registered node is actually associated with the created node, since checking only transaction success could allow that behavior to regress unnoticed.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: updating Hedera protobufs to v0.76.1.
Description check	✅ Passed	The description accurately describes the protobuf and Hiero version updates and links them to issue #2588.
Linked Issues check	✅ Passed	The changes update the documented protobuf version, workflow Hiero version, and generator source version to v0.76.1. The generator import exclusion and node transaction signing changes support compati…
Out of Scope Changes check	✅ Passed	The workflow, generator, example, and integration-test changes are related to the protobuf and Hiero v0.76.1 update, including imported-file handling and node transaction signature compatibility.
Docstring Coverage	✅ Passed	Docstring coverage is 85.71% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 5 files. (3 skipped: 3 u…

Full details: Linked Issues check

Explanation

The changes update the documented protobuf version, workflow Hiero version, and generator source version to v0.76.1. The generator import exclusion and node transaction signing changes support compatibility and the linked issue objectives [#2588].

Full details: Docstring Coverage

Explanation

Docstring coverage is 85.71% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 5 files. (3 skipped: 3 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: ada3c9a8-f0c3-484d-9598-23822afeafea

📥 Commits

Reviewing files that changed from the base of the PR and between 0ddef58 and f1f194b.

📒 Files selected for processing (8)

• .coderabbit.yaml
• .github/workflows/pr-check-secondary-examples.yml
• .github/workflows/pr-check-secondary-unit-integration-test.yml
• examples/nodes/node_create_transaction.py
• examples/nodes/node_delete_transaction.py
• examples/nodes/node_update_transaction.py
• generate_proto.py
• tests/integration/associated_registered_nodes_e2e_test.py

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

[manishdait]

lgtm! for signing changes, this transaction will most likely be used with an admin account eg 0.0.2 on solo. It is likely that sdk users will use it as well, but I think it would be better to mention this change in the release changelog on relase

[exploreriii]

You might have to change

[MonaaEid]

You might have to change

change what?

[github-actions]

👋 Hi @MonaaEid! Great work completing a Intermediate issue! 🎉

Thanks for your contribution! 🚀

Here are some issues you might want to explore next:

• Document the qualifications or pre-requisites to qualify as triage/committer/maintainer
• feat(tck): implement createNode JSON-RPC method
• feat(tck): implement getAddressBook JSON-RPC method
• feat(tck): implement createEthereumTransaction JSON-RPC method
• feat: generate ResponseCode member list from proto in generate_proto.py

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