fix(release): honor workflow input tag

[elibosley]

Summary

• Fix reusable release validation to prefer an explicit workflow input tag.
• Fall back to the triggering ref for tag-push validation.
• Prevent release-please calls from validating main as the release tag.

Verification

• Local release metadata validation with RELEASE_TAG=v0.1.0 passed.
• GitHub Actions workflow_dispatch passed: https://github.com/unraid/apprise-plugin/actions/runs/26173132012

Summary by CodeRabbit

• Chores
  • Updated release workflow configuration for improved consistency in tag resolution during deployment procedures across different release contexts.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 1c8464af-0820-48fc-8c93-69ece1e6ca64

📥 Commits

Reviewing files that changed from the base of the PR and between 0948c37 and 3c219db.

📒 Files selected for processing (1)

• .github/workflows/release.yml

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📝 Walkthrough

Walkthrough

The release workflow is updated to simplify tag resolution. The Checkout step now directly uses inputs.tag || github.ref, and the metadata validation step sets RELEASE_TAG from inputs.tag || github.ref_name, with the validation script reading from this unified environment variable instead of conditionally branching on GitHub event context.

Changes

Tag Resolution Unification

Layer / File(s)	Summary
Checkout and validation tag resolution .github/workflows/release.yml	Checkout uses `inputs.tag

🎯 2 (Simple) | ⏱️ ~8 minutes

🐰 A workflow once asked which tag to use,
Now it simply picks—no branching fuse!
Input or ref, the choice flows clean,
Simplest resolution code has seen. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'fix(release): honor workflow input tag' follows the conventional commits format with a 'fix:' prefix and clearly describes the main change: correcting the release workflow to properly use the workflow input tag.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/fix-release-workflow-input-tag

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch codex/fix-release-workflow-input-tag

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