Automatically delete release branch after merge

[nwiltsie]

Description

This is a little nicety that I'd like to slip in before bumping the major version (see #29). All this does is try to delete the release branch at the end of the release finalization workflow.

If the deletion fails (as in my example below where I deleted the branch manually) the workflow logs any error messages but does not fail.

Successful Deletion

PR: https://github.com/uclahs-cds/user-nwiltsie-pipeline/pull/50
Workflow logs: https://github.com/uclahs-cds/user-nwiltsie-pipeline/actions/runs/13015993703/job/36305213472#step:8:18

Deleted branch automation-create-release-2.3.1

Unsuccessful Deletion

PR: https://github.com/uclahs-cds/user-nwiltsie-pipeline/pull/51
Workflow logs: https://github.com/uclahs-cds/user-nwiltsie-pipeline/actions/runs/13016071577/job/36305465966#step:8:180

Failed to delete branch automation-create-release-2.3.2
Stdout: {"message":"Reference does not exist","documentation_url":"https://docs.github.com/rest/git/refs#delete-a-reference","status":"422"}
Stderr: gh: Reference does not exist (HTTP 422)

Closes #27

Checklist

• This PR does NOT contain Protected Health Information (PHI). A repo may need to be deleted if such data is uploaded.
  Disclosing PHI is a major problem¹ - Even a small leak can be costly².

• This PR does NOT contain germline genetic data³, RNA-Seq, DNA methylation, microbiome or other molecular data⁴.

• This PR does NOT contain other non-plain text files, such as: compressed files, images (e.g. .png, .jpeg), .pdf, .RData, .xlsx, .doc, .ppt, or other output files.

  To automatically exclude such files using a .gitignore file, see here for example.

• I have read the code review guidelines and the code review best practice on GitHub check-list.

• I have set up or verified the main branch protection rule following the github standards before opening this pull request.

• The name of the branch is meaningful and well formatted following the standards, using [AD_username (or 5 letters of AD if AD is too long)]-[brief_description_of_branch].

• I have added the major changes included in this pull request to the CHANGELOG.md under the next release version or unreleased, and updated the date.

Footnotes

1. UCLA Health reaches $7.5m settlement over 2015 breach of 4.5m patient records ↩

2. The average healthcare data breach costs $2.2 million, despite the majority of breaches releasing fewer than 500 records. ↩

3. Genetic information is considered PHI.
   Forensic assays can identify patients with as few as 21 SNPs ↩

4. RNA-Seq, DNA methylation, microbiome, or other molecular data can be used to predict genotypes (PHI) and reveal a patient's identity. ↩

[nwiltsie]

Just for my own sanity if I ever come back here - I changed the calling workflow to produce the tarball between these two runs: https://github.com/uclahs-cds/user-nwiltsie-pipeline/commit/1f9939c501c30da21355bc134160ca42fe27f7dc. It is totally expected that the PR messages look different.

[yashpatel6]

Looks good!