fix(workflow): prevent PR branch bloat and respect wontfix label

[Copilot]

Each workflow run was merging all of master into existing PR branches (git merge master --strategy-option=theirs), causing single-file capability PRs to balloon to hundreds of unrelated files over successive runs. Additionally, files with open wontfix-labelled PRs were continuously re-processed.

Root causes

• Branch pollution: when updating an existing PR, the old code checked out the stale remote branch then merged master into it — pulling in every file that had changed on master since the branch was created. PR Update json/pumpControlMode.json #411 (for one file) ended up with 705 changed files after 57 runs.
• No wontfix guard: no label check existed, so every run would re-update branches the user had explicitly marked to never merge.

Changes

• Save all API-downloaded files to /tmp upfront — decouples file content from git branch state so subsequent checkouts cannot discard it.
• Fresh branch per capability file — replace the stale-branch-checkout + merge pattern with git checkout -B "$branch_name" master followed by applying only that one file. Force-pushes override any bloated history. Guarantees exactly 1 file changed per PR regardless of prior runs.

  # Before — merges all of master into branch, accumulates unrelated files
  git checkout -B "$branch_name" "origin/$branch_name"
  git merge master --strategy-option=theirs
  
  # After — always a clean single-file branch from master
  git checkout -B "$branch_name" master
  cp "/tmp/changed_caps/$basename_file" "$file"
  git add "$file"

• wontfix label check — gh pr list --json labels queried before any git work; files whose open PR carries wontfix are skipped entirely.
• Removed stash/pop — the entire stash-based approach was fragile and unnecessary once files are pre-saved to /tmp.
• Translations/presentations and README follow the same fresh-branch pattern with --force push.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

Updates the scheduled capability-generation workflow to avoid “branch pollution” by always creating clean, single-file PR branches from master, and to skip processing when an existing PR is labeled wontfix.

Changes:

• Pre-saves all modified API-downloaded files into /tmp before any branch switching.
• Switches to a “fresh branch from master + copy exactly the intended file” approach (force-push) to guarantee PRs don’t accumulate unrelated changes.
• Adds a wontfix label guard for existing open PRs on per-capability branches; removes the prior stash/merge-based workflow.

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