[Omni] Verify release tags before pushing

[numbers-official]

Summary

Update the release workflow to fetch full Git history and validate release tags before pushing changes. This prevents release runs from partially updating main when the target version tag already exists, keeping branch and tag pushes atomic and avoiding inconsistent release state.

Changes

• Set fetch-depth: 0 in .github/workflows/release.yml so the workflow can inspect existing tags.
• Add a pre-push check for the computed release tag before updating main.
• Keep the release push flow focused on preventing duplicate tags without broadening unrelated workflow behavior.

2 files changed, +12 additions, -3 deletions

File changes

.github/workflows/release.yml     | 12 ++++++++++--
 .omni/e42f8a19-untitled/memory.md |  3 ++-

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