publish GH workflow

[brozorec]

This PR adds a gh action for publishing some of the workspace members to crates.io. It also sets an explicit version to "stellar-contract-utils" in the main Cargo.toml, because "stellar-tokens" depends on it and cannot be published without explicit version.
Also added codeowners.

Summary by CodeRabbit

• Chores
  • Added automated workflow to streamline release publishing
  • Updated dependency version constraints for consistency
  • Added code ownership configuration

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[coderabbitai]

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Walkthrough

This pull request establishes project governance and automation infrastructure by adding a CODEOWNERS file, introducing a GitHub Actions workflow for automated crate publishing, and explicitly versioning a workspace dependency constraint.

Changes

Cohort / File(s)	Summary
Project Governance .github/CODEOWNERS	Designates two code owners for repository access and review governance
CI/CD Automation .github/workflows/publish-crates.yml	Introduces workflow for automated publishing of seven Rust crates to crates.io, with dry-run validation and tag-triggered deployment
Dependency Management Cargo.toml	Adds explicit version constraint (0.6.0) to stellar-contract-utils workspace dependency while maintaining local path reference

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 The owners now stand guard with care,
Workflows publish crates through the air,
Versions pinned with precision true,
Automation dreams come into view! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'publish GH workflow' is vague and partially related to the main change. While the PR does add a GitHub workflow for publishing, the title lacks specificity about publishing to crates.io and omits other significant changes like setting explicit versions and adding CODEOWNERS.	Consider a more descriptive title such as 'Add crates.io publishing workflow and update stellar-contract-utils version' to better reflect all changes in the PR.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description check	✅ Passed	The PR description explains the changes and rationale clearly, addressing the workflow addition, version pinning requirement, and CODEOWNERS addition. However, it does not follow the provided template structure with sections like 'Fixes', 'Tests', or 'Documentation' checklist items.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch publish-workflow

---

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In @.github/workflows/publish-crates.yml:
- Around line 44-48: The Publish job is running in parallel with dry-run; add an
explicit dependency so publishing only runs after dry-run succeeds by adding a
needs: [dry-run] entry to the publish job definition (reference the job id
"publish" and the dry-run job id "dry-run") so the publish job will wait for the
dry-run job to complete successfully.

🧹 Nitpick comments (1)

.github/workflows/publish-crates.yml (1)

7-9: Consider using a stable ref for concurrency grouping.

For tag pushes, ${{ github.head_ref || github.run_id }} makes the group unique per run, so cancel-in-progress won’t de‑dupe. Using github.ref_name will group by tag.

♻️ Suggested tweak

 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  group: ${{ github.workflow }}-${{ github.ref_name }}
   cancel-in-progress: true

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.07%. Comparing base (82f9711) to head (730d8ca).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #554   +/-   ##
=======================================
  Coverage   96.07%   96.07%           
=======================================
  Files          54       54           
  Lines        5201     5201           
=======================================
  Hits         4997     4997           
  Misses        204      204           

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