/pr

Create or update a pull request for the current work, with mutation testing

# SDLC Pull Request

Create or update a pull request for the current work. This command:
1. Runs mutation testing to verify test quality
2. Creates or updates the PR
3. Links PR to the issue
4. Keeps issue in "In Progress" (PR goes to Review)

## Steps

### 1. Load Configuration

Read `.claude/sdlc.yaml` for git workflow settings.

### 2. Detect Current Issue

From the current branch name, extract the issue number:


Parse issue number from branch name (e.g., `feature/123-add-login` → `123`).

If no issue number in branch, ask user which issue this PR is for.

### 3. Run Mutation Testing

U...